Computer system and method for establishing a standardized shared level for each storage unit
专利汇可以提供Computer system and method for establishing a standardized shared level for each storage unit专利检索，专利查询，专利分析的服务。并且A computer system and method using a standardized shareability scheme for establishing a shared level for each of a plurality of storage units located in the computer system. The computer system includes a plurality of hosts and controllers coupled to a peer network (storage area network). Each storage unit is coupled to one of the controllers and includes at least one parametric from a group of parametrics used in classifying the shared level of a particular storage unit. The hosts using the standardized shared levels are able to identify a shareability characteristic of each storage unit.，下面是Computer system and method for establishing a standardized shared level for each storage unit专利的具体信息内容。
What is claimed is:1. A computer system comprising:a storage area network;a plurality of hosts coupled to the storage area network; anda plurality of storage units coupled to the storage area network, each storage unit classified by a standardized shared level from a plurality of standardized shared levels, each standardized shared level comprising at least one parametric from a plurality of distinct parametrics, the plurality of distinct parametrics being associated with functionalities of the plurality of storage units, wherein the respective standardized shared level assigned to each storage unit enables the hosts to identify a standardized shareability characteristic of each storage unit.2. The computer system in accordance with claim 1, comprising at least one controller located between the storage area network and at least one of the storage units.3. The computer system in accordance with claim 2, wherein the at least one controller comprises an intelligent controller.4. The computer system in accordance with claim 1, wherein the storage area network comprises one of a peer network and a storage topology.5. The computer system in accordance with claim 1, wherein at least one of the plurality of hosts comprises one of a server and an initiator.6. The computer system in accordance with claim 1, wherein at least one of the plurality of storage units comprises one of a tape drive, a tape library, a disk drive, a disk drive subsystem, an optical drive, an optical drive subsystem, a multi-media drive, and memory.7. The computer system in accordance with claim 1, wherein the plurality of distinct parametrics comprises a security parametric, an access parametric, an availability parametric, an ownership parametric, and a management parametric.8. The computer system in accordance with claim 7, wherein the plurality of standardized shared levels comprises a first shared level including three access levels of the access parametric, one availability level of the availability parametric, one ownership level of the ownership parametric and one management level of the management parametric.9. The computer system in accordance with claim 8, wherein a particular storage unit assigned the first shared level includes a command set comprising a readiness command, a positioning command, a write command, and a read command.10. The computer system in accordance with claim 7, wherein the plurality of standardized shared levels comprises a second shared level including three access levels of the access parametric, one availability level of the availability parametric, one ownership level of the ownership parametric, and two management levels of the management parametric.11. The computer system in accordance with claim 7, wherein the plurality of standardized shared levels comprises a third shared level including three access levels of the access parametric, one availability level of the availability parametric, two ownership levels of the ownership parametric, and two management levels of the management parametric.12. The computer system in accordance with claim 7, wherein the plurality of standardized shared levels comprises a fourth shared level including three access levels of the access parametric, one availability level of the availability parametric, three ownership levels of the ownership parametric, three management levels of the management parametric, and one security level of the security parametric.13. The computer system in accordance with claim 12, wherein the fourth shared level comprises at least one of a second security level, a third security level, and a fourth security level.14. A computer system comprising:a peer network;a plurality of hosts coupled to the peer network;a plurality of controllers coupled to the peer network; anda plurality of storage units coupled to the peer network, each storage unit classified by a standardized shared level from a plurality of standardized shared levels, each standardized shared level comprising at least one parametric from a plurality of distinct parametrics, the plurality of distinct parametrics being associated with functionalities of the plurality of storage units, wherein the respective standardized shared level assigned to each storage unit enables the hosts to identify a standardized shareability characteristic of each storage unit.15. The computer system in accordance with claim 14, wherein the plurality of distinct parametrics comprises a security parametric, an access parametric, an availability parametric, an ownership parametric, and a management parametric.16. The computer system in accordance with claim 15, wherein the security parametric comprises at least one security level from the following:a first security level for allowing a limited number of the hosts to use a particular storage unit;a second security level for requiring the hosts to use a password before gaining access to a particular storage unit;a third security level for requiring the hosts to use one of an encrypted password and an encrypted data password before gaining access to a particular storage unit and before gaining access to data located on the particular storage unit, respectively; anda fourth security level requiring the hosts to use both the encrypted password and the encrypted data password.17. The computer system in accordance with claim 15, wherein the access parametric comprises at least one access level from the following:a first access level for enabling the hosts to determine a presence of a particular storage unit;a second access level for informing the hosts that a particular storage unit is able to communicate; anda third access level for enabling the hosts to identify a particular storage unit.18. The computer system in accordance with claim 15, wherein the availability parametric comprisesa first availability level for permitting the hosts to communicate with a particular storage unit.19. The computer system in accordance with claim 15, wherein the ownership parametric comprises at least one ownership level from the following:a first ownership level for requiring a particular storage unit communicating with one of the hosts to respond with a busy signal to all other hosts;a second ownership level for permitting the reservation and release of a particular storage unit by the hosts; anda third ownership level for enabling only a predetermined number of the hosts to utilize a particular storage unit.20. The computer system in accordance with claim 15, wherein the management parametric comprises at least one management level from the following:a first management level for enabling the hosts to identify a particular storage unit and receive information about a state of the particular storage unit;a second management level for enabling the hosts to modify internal parameters of a particular storage unit; anda third management level for identifying a predetermined number of the hosts that can utilize a particular storage unit.21. A method for establishing a standardized shared level for a storage unit located in a computer system, said computer system includes a storage area network located between the storage unit and a plurality of hosts, said method comprising the steps of:assigning at least one parametric from a plurality of distinct parametrics to the storage unit;determining, in response to the at least one assigned parametric, the standardized shared level for the storage unit; andenabling the hosts to identify a shareability characteristic of the storage unit using the determined standardized shared level.22. The method in accordance with claim 21, wherein the step of assigning further includes classifying the plurality of distinct parametrics into a security parametric, an access parametric, an availability parametric, an ownership parametric and a management parametric.23. The method in accordance with claim 22, wherein said step of classifying further includes dividing the security parametric into at least one of the following security levels:a first security level for allowing a limited number of the hosts to use the storage unit;a second security level for requiring the hosts to use a password before gaining access to the storage unit;a third security level for requiring the hosts to use a selected one of an encrypted password and an encrypted data password before gaining access to the storage unit and before gaining access to data located on the storage unit, respectively; anda fourth security level requiring the hosts to use both the encrypted password and the encrypted data password.24. The method in accordance with claim 22, wherein the step of classifying further includes dividing the access parametric into at least one of the following access levels:a first access level for enabling the hosts to determine a presence of the storage unit;a second access level for informing the hosts that the storage unit is able to communicate; anda third access level for enabling the hosts to identify the storage unit.25. The method in accordance with claim 22, wherein the step of classifying further includes dividing the availability parametric into at least one availability level including a first availability level for permitting the hosts to communicate with the storage unit.26. The method in accordance with claim 22, wherein the step of classifying further includes dividing the ownership parametric into at least one of the following ownership levels:a first ownership level for requiring the storage unit communicating with one of the hosts to respond with a busy signal to all other hosts;a second ownership level for permitting the reservation and release of the storage unit by the hosts; anda third ownership level for enabling only a predetermined number of the hosts to utilize the storage unit.27. The method in accordance with claim 22, wherein the step of classifying further includes dividing the management parametric into at least one of the following management levels:a first management level for enabling the hosts to identify the storage unit and receive information about a state of the storage unit;a second management level for enabling the hosts to modify internal parameters of the storage unit; anda third management level for identifying a predetermined number of the hosts that can utilize the storage unit.28. A storage unit used in a computer system including a storage area network for connecting the storage unit to a plurality of hosts, the storage unit comprising:at least one parametric from a plurality of distinct parametrics comprisinga security parametric, an access parametric, an availability parametric, an ownership parametric, and a management parametric; anda plurality of standardized shared levels, each standardized shared level corresponds with the at least one parametric and enables the hosts to identify a standardized shareability characteristic of the storage unit.29. The storage unit in accordance with claim 28, wherein said plurality of standardized shared levels further comprising a first shared level including three access levels of said access parametric, one availability level of said availability parametric, one ownership level of said ownership parametric and one management level of said management parametric.30. The storage unit in accordance with claim 28, wherein said plurality of standardized shared levels further comprising a second shared level including three access levels of said access parametric, one availability level of said availability parametric, one ownership level of said ownership parametric and two management levels of said management parametric.31. The storage unit in accordance with claim 28, wherein said plurality of standardized shared levels further comprising a third shared level including three access levels of said access parametric, one availability level of said availability parametric, two ownership levels of said ownership parametric and two management levels of said management parametric.32. The storage unit in accordance with claim 28, wherein said plurality of standardized shared levels further comprising a fourth shared level including three access levels of said access parametric, one availability level of said availability parametric, three ownership levels of said ownership parametric, three management levels of said management parametric and one security level of said security parametric.33. The storage unit in accordance with claim 32, wherein said fourth shared level further includes at least one of a second security level, a third security level and a fourth security level.34. The storage unit in accordance with claim 28, wherein said security parametric further includes at least one security level from the following:a first security level for allowing a limited number of the hosts to use the storage unit;a second security level for requiring the hosts to use a password before gaining access to the storage unit;a third security level for requiring the hosts to use a selected one of an encrypted password and an encrypted data password before gaining access to the storage unit and before gaining access to data located on the storage unit, respectively; anda fourth security level requiring the hosts to use both the encrypted password and the encrypted data password.35. The storage unit in accordance with claim 28, wherein said access parametric further includes at least one access level from the following:a first access level for enabling the hosts to determine a presence of the storage unit;a second access level for informing the hosts that the storage unit is able to communicate; anda third access level for enabling the hosts to identify the storage unit.36. The storage unit in accordance with claim 28, wherein said availability parametric further includes at least one availability level including a first availability level for permitting the hosts to communicate with the storage unit.37. The storage unit in accordance with claim 28, wherein said ownership parametric further includes at least one ownership level from the following:a first ownership level for requiring the storage unit communicating with one of the hosts to respond with a busy signal to all other hosts;a second ownership level for permitting the reservation and release of the storage unit by the hosts; anda third ownership level for enabling only a predetermined number of the hosts to utilize the storage unit.38. The storage unit in accordance with claim 28, wherein said management parametric further includes at least one management level from the following:a first management level for enabling the hosts to identify the storage unit and receive information about a state of the storage unit;a second management level for enabling the hosts to modify internal parameters of the storage unit; anda third management level for identifying a predetermined number of the hosts that can utilize the storage unit.39. A storage unit, comprising:at least a first parametric from a plurality of parametrics, the plurality of parametrics comprising an access parametric, an availability parametric, an ownership parametric, and a management parametric; anda first standardized shared level from a plurality of standardized shared levels, wherein each of the standardized shared levels is defined by at least one parametric from the plurality of parametrics, wherein the first standardized shared level is determined based on the at least first parametric, and wherein the first standardized shared level enables a host to identify a standardized shareability characteristic of the storage unit when the storage unit is coupled to the host via a network.40. The storage unit as recited in claim 39, wherein the plurality of parametrics comprises a security parametric.41. The storage unit as recited in claim 40, wherein the security parametric comprises a plurality of security levels, each security level identifying a level of security required for the host to use the storage unit.42. The storage unit as recited in claim 41, wherein a first level of security comprises an encrypted password to be used by the host.43. The storage unit as recited in claim 39, wherein the access parametric comprises a plurality of access levels, each access level indicative of a particular level of access to the storage unit by the host.44. The storage unit as recited in claim 39, wherein the availability parametric comprises a plurality of availability levels, each availability level indicative of a condition under which the storage unit is available for access by the host.45. The storage unit as recited in claim 39, wherein the ownership parametric comprises a plurality of ownership levels, each ownership level indicative of a type of ownership of the storage unit by the host.46. The storage unit as recited in claim 39, wherein the management parametric comprises a plurality of management levels, each management level indicative of a level of management of the storage unit by the host.
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The present invention relates to the computer field and, in particular, to a computer system and method for establishing and standardizing a shared level for each storage unit located in a multi-server environment.
2. Description of Related Art
A current computer system incorporating multiple servers capable of sharing at least one storage unit has a time consuming task of identifying the specific capabilities of a particular storage unit prior to utilizing that storage unit. The specific capabilities of any storage unit often include functionalities related to access, availability, ownership, management and security (optional). Of course, the current computer system uses valuable resources in determining the different capabilities of every storage unit located within the computer system.
Accordingly, there is a need for a computer system and method for establishing a standardized shared level for each storage unit located in a multi-server environment, where each shared level is indicative of the specific capabilities (e.g., parametrics) of a corresponding storage unit. In other words, there is a need for a computer system and method having a scheme for standardizing and unifying the description of the various capabilities of different storage units using standardized shared levels based on parametrics. This and other needs are satisfied by the computer system and method of the present invention.
SUMMARY OF THE INVENTION
The present invention is a computer system and method using a standardized shareability scheme for establishing a shared level for each of a plurality of storage units located in the computer system. The computer system includes a plurality of hosts and controllers coupled to a peer network (storage area network). Each storage unit is coupled to one of the controllers and includes at least one parametric from a group of parametrics used in classifying the shared level of a particular storage unit. The hosts using the standardized shared levels are able to identify a shareability characteristic of each storage unit.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the method and apparatus of the present invention may be had by reference to the following detailed description when taken in conjunction with the accompanying drawings wherein:
FIG. 1
is a block diagram of a computer system in accordance with the present invention; and
FIG. 2
is a block diagram illustrating the exemplary standardized shared levels and various parametrics that can be associated with the storage units shown in FIG.
1
.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to the Drawings, wherein like numerals represent like parts throughout
FIGS. 1-2
, there is disclosed an embodiment of an exemplary computer system
100
and method in accordance with the present invention.
In order to better describe the present invention a detailed description about the standardized shared levels and various parametrics of the storage units within the computer system
100
is deferred pending a discussion about the general architecture of the computer system.
Referring to
FIG. 1
, there is illustrated a block diagram of the computer system
100
in accordance with the present invention. For clarity, certain details associated with the computer system
100
are well known in the industry and as such are not described herein. Therefore, the description provided below in relation to the computer system
100
and the method describes only the components necessary to understand the present invention.
The computer system
100
is preferably configured using a system network
102
such as a Local Area Network (LAN), a System Area Network (SAN) or a Wide Area Network (WAN). The system network
102
can be a high-speed communication system designed to link several workstations
104
and hosts
106
(e.g., servers/initiators) together so as to share computing resources including hardware, application programs and information.
The hosts
106
connect to a storage area network
108
(e.g., peer network/storage topology) using line
110
, where the storage area network is transport independent. For example, the storage area network
108
of the presently described computer system is preferably based on the Fibre Channel standard which is incorporated to the fullest extent possible into this specification.
The storage area network
108
also connects to at least one controller
112
or at least one intelligent controller
114
using lines
116
, where the differences between the types of controllers are discussed later. Each controller
112
or intelligent controller
114
is coupled with or incorporated into a corresponding storage unit
118
that operates to store data including files and images. In addition, each controller
112
and intelligent controller
114
may be capable of writing, reading and reformatting data from and to any of the hosts
106
or respective storage units
118
.
Of course, there may be more than one type of storage unit
118
located within the computer system
100
which may include for example, a tape drive
120
, tape library
122
, disk drive
124
, disk drive subsystem
126
, optical drive
128
, optical drive subsystem
130
, multi-media drive
132
and memory within a central processing unit
134
. As mentioned earlier, the standardized shared levels and various parametrics of the different storage units
118
are discussed with reference to FIG.
2
.
Referring to
FIG. 2
, there is a block diagram illustrating the standardized shared levels
212
,
214
,
216
, and
218
used to classify the various parametrics associated with the storage units
118
shown is FIG.
1
. As described earlier, one aspect of the present invention includes classifying the different capabilities of storage units
118
by establishing different standardized shared levels (e.g., first shared level
212
, second shared level
214
, third shared level
216
and fourth shared level
218
) based on the specific parametrics or physical properties of the particular storage unit
118
. It should be understood that the different types (e.g.,optical drive
128
and tape drive
120
) of storage units
118
can still have the same parametrics or shared levels
212
,
214
,
216
, or
218
.
The parametrics can be classified into a security parametric
240
, an access parametric
250
, an availability parametric
260
, an ownership parametric
270
and a management parametric
280
. In addition, each parametric
240
,
250
,
260
and
270
can be further divided into multiple levels that are described later with respect to the different standardized shared levels
212
,
214
,
216
and
218
. Again, the various parametrics
240
,
250
,
260
, and
270
are used to classify and identify the physical properties and capabilities of each storage unit
118
.
In addition, use of the various parametrics
240
,
250
,
260
and
270
enables the hosts
106
or user to measure the “sharedness” of any one of the storage units
118
, and to identify the storage units capable of evolving into a smart device. The smart device has the capability to change or modify any of the parametrics
240
,
250
,
260
and
270
associated with itself.
Referring to the first shared level
212
, the storage units
118
(e.g., tape drive
120
and optical drive
128
) identified by the first shared level
212
include the access parametric
250
, the availability parametric
260
, the ownership parametric
270
and the management parametric
280
. The lack of the security parametric
240
indicates that any one of the hosts
106
can have ownership of the storage unit
118
. Below is a detailed description of each parametric
250
,
260
,
270
and
280
associated with the first shared level
212
.
The presence of the access parametric
250
preferably indicates that a particular communication protocol has enabled the respective controller
112
or
114
with the ability to read or write data from and to the corresponding storage unit
118
. More particularly, the access parametric
250
includes a first access level
252
for enabling the hosts
106
to determine a presence of the storage unit
118
, a second access level
254
for informing the hosts that the storage unit can communicate in the first place, and a third access level
256
for enabling the hosts to identify the storage unit.
The presence of the availability parametric
260
generally indicates the conditions under which the storage unit
118
and particular controller
112
and
114
are available to be accessed. More particularly, the availability parametric
260
includes a first availability level
262
that permits the hosts
106
to communicate with the storage unit
118
. Of course, the storage unit
118
requires at least the levels of the access parametric
250
and the availability parametric
260
to be functional.
The presence of the ownership parametric
270
typically indicates that one of the hosts
106
can be associated with a particular storage unit
118
and controller
112
or
114
. More specifically, the ownership parametric
270
includes a first ownership level
272
that requires the storage unit
118
to respond with a busy signal to all other hosts while communicating with one of the hosts
106
. The first ownership level
272
may also be referred to as “Command Ownership”. The storage unit
118
can be available but functionally inaccessible due to the status of the first ownership level
272
.
The presence of the management parametric
280
is indicative of the specific ability to set, inquire and/or change configurations of the controller
112
or
114
attached to the storage unit
118
. More particularly, the management parametric
280
includes a first management level
282
for enabling the hosts
106
to identify the storage unit
118
and receive information about the state of the storage unit.
Therefore, any storage unit
118
(e.g., tape drive
120
and optical drive
128
) assigned the first shared level
212
includes the parametrics of the three access levels
252
,
254
, and
256
from the access parametric
250
, one availability level
262
from the availability parametric
262
, one ownership level
272
from the ownership parametric
270
and one management level
282
from the management parametric
280
.
Moreover, a minimum command set used by the storage units
118
assigned the first shared level
212
include a readiness command, positioning command, write command and a read command. It should be understood, that disks (e.g., disk drives
124
and disk sub-systems
126
) have the positioning command within the write and read commands, and storage units
118
that are sequential have separate positioning commands.
Referring to the second shared level
214
, the storage units
118
(e.g., tape library
122
and multi-media drive
132
) identified by the second shared level
214
include the parametrics
250
,
260
,
270
and
280
and associated levels of the first shared level
212
in addition to a second management level
284
. The second management level
284
enables the hosts
106
to modify the internal parameters of the storage unit
118
. The internal parameters include blocking size, mode pages, log pages, vendor unique inquiry data, error conditions and status conditions.
Therefore, any storage unit
118
(e.g., the tape drive
122
and multi-media drive
132
) assigned the second shared level
214
includes the parametrics of the three access levels
252
,
254
, and
256
from the access parametric
250
, one availability level
262
from the availability parametric
262
, one ownership level
272
from the ownership parametric
270
and two management levels
282
and
284
from the management parametric
280
.
Referring to the third shared level
216
, the storage units
118
(e.g., disk drive
124
and memory in the CPU
134
) identified by the third shared level
216
, include the parametrics
250
,
260
,
270
and
280
and associated levels of the second shared level
214
in addition to a second ownership level
274
. The second ownership level
274
permits the reservation and release of the storage unit
118
by the hosts
106
.
Therefore, any storage unit
118
(e.g., disk drive
124
and memory in the CPU
134
) assigned the third shared level
216
includes the parametrics of the three access levels
252
,
254
, and
256
from the access parametric
250
, one availability level
262
from the availability parametric
262
, two ownership levels
272
and
274
from the ownership parametric
270
and two management levels
282
and
284
from the management parametric
280
.
Referring to the fourth shared level
218
, the storage units
118
(e.g., disk drive subsystem
126
and optical drive subsystem
130
) assigned the fourth shared level
218
include the parametrics
250
,
260
,
270
, and
280
and associated levels of the third shared level
216
in addition to a first security level
242
of a security parametric
240
, and a third ownership level
276
and a third management level
286
.
The first security level
242
operates to allow a limited number of the hosts
106
to use the respective storage unit
118
. The first security level
242
is effectively triggered by the presence of the third management level
286
that identifies a predetermined number of hosts
106
capable of using the storage unit
118
, and the third ownership level
276
that enables the predetermined number of hosts to utilize the storage unit.
Therefore, any storage unit
118
(e.g., disk drive sub-system
126
and optical drive subsystem
130
) assigned the fourth shared level
218
includes the parametrics of one security level
242
from the security parametric
240
, three access levels
252
,
254
, and
256
from the access parametric
250
, one availability level
262
from the availability parametric
262
, three ownership levels
272
,
274
and
276
from the ownership parametric
270
and three management levels
282
,
284
and
286
from the management parametric
280
. Again, the hosts
106
or user are able to identify a shareability characteristic of a particular storage unit
118
by referring to the corresponding standardized shared level
212
,
214
,
216
or
218
.
Also, the fourth shared level
218
may not be limited to the first security level
242
in that the storage unit
118
may also include selected ones of a second security level
244
, a third security level
246
and a fourth security level
248
. The second security level
244
requires the hosts
106
to use a password before gaining access to the storage unit. The third security level
246
requires the hosts to use either an encrypted password or an encrypted data password before gaining access to the storage unit
118
and before gaining access to data located on the storage unit, respectively. The fourth security level
248
requires the hosts
106
to use both the encrypted password and the encrypted data password.
The storage units
118
identified by the third shared level
216
or the fourth shared level
218
generally use intelligent controllers
114
instead of the controllers
112
, but are not required to use the intelligent controllers. The intelligent controllers
114
use a protocol (e.g., in-band communication) to communicate with the attached storage unit
118
. In addition to the capabilities of the controllers
112
, the intelligent controllers
114
include time availability, capacity availability and performance availability capabilities. The intelligent controller
114
having the time availability capability can operate a predetermined number of hours per session, and for a specific number or on a specific hour(s), day(s), month(s), or year(s). The capacity availability capability enables the intelligent controller
114
to determine the amount of media currently available in the storage unit
118
. And, the intelligent controller
114
having the performance availability capability is able to dynamically control the data transfer rate or data stream control such that other hosts
106
contending for access to the storage unit
118
are not starved.
The following is an exemplary equation that may be used for determining the shared value of a storage unit:
S
su
=(S+Sc)*AC*AU*(1+(O+M)) (1)
where S
su
=shared level of a storage unit;
S=Security
Sc=command security (Sc≠O);
AC=access level;
AV=availability level;
O=ownership level; and
M=management level.
From the foregoing, it can be readily appreciated by those skilled in the art that the present invention provides a computer system and method for establishing and standardizing a shared level for each storage unit located in a multi-server environment. Also, the computer system as disclosed enables the hosts or user to identify a shareability characteristic of each storage unit using standardized shared levels.
Although one embodiment of the method and apparatus of the present invention has been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the spirit as set forth and defined by the following claims.
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