Architecture - Interoperability 1.6 1.8 2.0 - Revision history

Docadmin at 21:13, 22 January 2010

2010-01-22T21:13:57Z

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	'''''Note:''''' The content on this page reflects the state of design of a Lustre feature at a particular point in time and may contain outdated information.		'''''Note:''''' ''The content on this page reflects the state of design of a Lustre feature at a particular point in time and may contain outdated information.
			''
	== Definitions ==		== Definitions ==

Docadmin: Protected "Architecture - Interoperability 1.6 1.8 2.0" ([edit=sysop] (indefinite) [move=sysop] (indefinite))

2010-01-21T20:01:54Z

Protected "Architecture - Interoperability 1.6 1.8 2.0" ([edit=sysop] (indefinite) [move=sysop] (indefinite))

← Older revision	Revision as of 13:01, 21 January 2010
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Docadmin at 23:59, 18 January 2010

2010-01-18T23:59:35Z

← Older revision		Revision as of 16:59, 18 January 2010
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			'''''Note:''''' The content on this page reflects the state of design of a Lustre feature at a particular point in time and may contain outdated information.

	== Definitions ==		== Definitions ==

Docadmin: /* QAS Summary Table */

2010-01-18T23:41:53Z

QAS Summary Table

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	\|client-upgrade\|\|Feature\|\|A cluster has upgraded all servers from 1.6 to 1.8. An upgrade of a client from 1.6 to 1.8 succeeds.		\|client-upgrade\|\|Feature\|\|A cluster has upgraded all servers from 1.6 to 1.8. An upgrade of a client from 1.6 to 1.8 succeeds.
	\|}		\|}

	~~[[Category:QAS\|1.6 1.8 2.0 interoperability]]~~

Docadmin: moved QAS 1.6 1.8 2.0 interoperability to Architecture - Interoperability 1.6 1.8 2.0

2010-01-15T18:53:46Z

moved QAS 1.6 1.8 2.0 interoperability to Architecture - Interoperability 1.6 1.8 2.0

← Older revision	Revision as of 11:53, 15 January 2010
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Docadmin: 1 revision

2010-01-15T18:51:39Z

1 revision

← Older revision	Revision as of 11:51, 15 January 2010
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Nikita: categorize.

2007-02-19T15:28:22Z

categorize.

New page

== Definitions ==

{| border=1 cellspacing=0
| 1.6
| current b1_6 branch
|-
| 1.6-fid
| b1_6 branch with client support for b_new_cmd wire format. No cmd.
|-
| 1.8
| current b_new_cmd code without clustered metadata functionality, with features to transition from 1.6 to cmd storage.
|-
| 1.8 limited mode
| A 1.8 server mounted in limited mode is able to run on top of 1.6 storage, and interoperates with 1.6-fid clients.
|-
| 1.8 full mode
| Full mode is achieved through a mount option. It uses 1.8 b_new_cmd code. Server can handle mixed 1.6 and 1.8 storage and makes format changes to the file system that are not compatible with 1.8. No clustered metadata. No interoperability with 1.6 clients.
|-
| format upgrade
| a background script that runs while a 1.8 server is running and upgrades all directory formats to cmd3 format.
|-
| 2.0
| cmd3 code with full interoperability with 1.8 and clustered metadata features.
|-
| limited protocol
| minor discrepancies for 1.6 client - 1.8 server interaction compared with 1.6 -1.6 and 1.8-1.8 interaction.
|}

b_new_cmd is also referred to as cmd3.

1.6-fid will be relased as 1.6.N for some N.

== QAS Summary Table ==

{|cellspacing="0" border="1"
!Id
!Quality
!Summary
|-
|upgrade-srv||Feature||A server in a 1.6 cluster is upgraded to 1.8. It can mount a 1.6 file system and start in restricted mode.
|-
|restricted-mode-srv||Feature||An upgraded server continues to mount a server file system in restricted moded until a directive is given.
|-
|downgrade-srv||Feature||A server which only has been started in restricted mode is downgraded to a 1.6 server. The 1.6 server can start if only 1.6 clients are present in the cluster.
|-
|client-interop||Feature||A 1.6 client can interoperate with an upgraded server and 1.8 clients running in restricted mode.
|-
|client-upgrade||Feature||A cluster has upgraded all servers from 1.6 to 1.8. An upgrade of a client from 1.6 to 1.8 succeeds.
|}

[[Category:QAS|1.6 1.8 2.0 interoperability]]