snapshots+highmem+'md raid5'
Anyone out there using MD RAID5 as physical volumes, high memory enabled (> 960m of physical memory) and snapshots under load successfully ?
Regards,
Heinz -- The LVM Guy --
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
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Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf Germany
[email protected] +49 2626 141200
FAX 924446
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Quoted 3 lines · Heinz J . Mauelshagen
Anyone out there using MD RAID5 as physical volumes, high memory enabled (> 960m of physical memory) and snapshots under load successfully ?
FYI: I use MD RAID5 as physical but I had to disable the himem completely, because otherwise 1.0.7 would live-lock the entire system ...
best,
Herbert
Quoted 21 lines
Regards,
Heinz -- The LVM Guy --*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf Germany
[email protected] +49 2626 141200FAX 924446=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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Quoted 4 lines · Heinz J . Mauelshagen
Anyone out there using MD RAID5 as physical volumes, high memory enabled (> 960m of physical memory) and snapshots under load successfully ?
It depends on your definition of successful. I'm using 2.4.18 with HIGHMEM and RAID 5 physical volumes, (and my chaining snapshot patch). Existing snapshots seem to work OK under load, but I have trouble creating the snapshots under load consistently. My problems are with xfs_fs_freeze(), xfs's fsync_dev_lockfs implementation.
I have similar problems with 2.4.19. I've run with 2.4.20, but not under load. Haven't tried 2.4.21 yet.
Dale J. Stephenson
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