Progressive File Layout (PFL) (LU-8998)

[LU-9165] MDS handling of PFL layout initialization Created: 28/Feb/17  Updated: 08/Jul/17  Resolved: 20/Apr/17

Status: Resolved
Project: Lustre
Component/s: None
Affects Version/s: None
Fix Version/s: Lustre 2.10.0

Type: Technical task Priority: Minor
Reporter: Zhenyu Xu Assignee: Zhenyu Xu
Resolution: Fixed Votes: 0
Labels: None

Rank (Obsolete): 9223372036854775807

 Description   

This work tracked the MDS handling of PFL layout object initialization.

  • Initialize the OST objects of the 1st component of the PFL when its data are being created or its layout being set.
  • When the client tries to write beyond OST-object-initialized extent range, it will issue an IT_LAYOUT_MOD intent lock RPC, indicating the end offset of the write range, MDS needs to handle this RPC to allocate all OST objects of components covering this range.
  • MDS also needs to handle the replay of IT_LAYOUT_MOD RPC, which contains the current layout objects which the client knows, so that MDS won't allocate those OST objects again.

 Comments   
Comment by Joseph Gmitter (Inactive) [ 28/Feb/17 ]

Assigning to Alex per discussion at the F2F

Comment by Gerrit Updater [ 02/Mar/17 ]

Bobi Jam (bobijam@hotmail.com) uploaded a new patch: https://review.whamcloud.com/25716
Subject: LU-9165 pfl: MDS only initantiate 1st component
Project: fs/lustre-release
Branch: pfl
Current Patch Set: 1
Commit: e780956126894b17e92048522ca07abc7ded6f89

Comment by Gerrit Updater [ 02/Mar/17 ]

Bobi Jam (bobijam@hotmail.com) uploaded a new patch: https://review.whamcloud.com/25717
Subject: LU-9165 pfl: MDS handling of IT_LAYOUT_MOD RPC
Project: fs/lustre-release
Branch: pfl
Current Patch Set: 1
Commit: 8655ba867e98674f35f04b4af26a320a3f476776

Comment by Gerrit Updater [ 22/Mar/17 ]

Bobi Jam (bobijam@hotmail.com) uploaded a new patch: https://review.whamcloud.com/26118
Subject: LU-9165 pfl: MDS handling of IT_LAYOUT_MOD RPC
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 4ae517a859e3812dddebc20c2580f9cdf8fe8ffe

Comment by Gerrit Updater [ 01/Apr/17 ]

Jinshan Xiong (jinshan.xiong@intel.com) merged in patch https://review.whamcloud.com/25717/
Subject: LU-9165 pfl: MDS handling of write intent IT_LAYOUT RPC
Project: fs/lustre-release
Branch: pfl
Current Patch Set:
Commit: 30f9e3a1e77dd3f7405526a9592e1a8577146059

Comment by Joseph Gmitter (Inactive) [ 20/Apr/17 ]

Bobijam,

Is all work landed to both pfl and master? Is there any tasks left to do?

Thanks.
Joe

Comment by Zhenyu Xu [ 20/Apr/17 ]

patch landed in pfl and master branch

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