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Total 11 documents matching your query.

1. RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: pg_xf2@xxxxxxxxxxxxxxxxxx (Peter Grandi); Date: Sat, 30 Apr 2011 16:27:48 +0100; While I agree with BAARF.com arguments fully, I sometimes have to deal with legacy systems with wide RAID6 sets (for example 16 drives, quite revolting) which have op-journaled filesystems on them li; /archives/xfs/2011-04/msg00424.html (9,207 bytes)
2. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>; Date: Sat, 30 Apr 2011 18:02:13 +0200; Le Sat, 30 Apr 2011 16:27:48 +0100 vous écriviez: Revolting for what? I manage hundreds of such systems, but 99% of them are used for video storage (typical file size range is several to hundred of G; /archives/xfs/2011-04/msg00425.html (10,539 bytes)
3. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>; Date: Sat, 30 Apr 2011 14:54:02 -0500; How bad can this be when the journal is say internal for a filesystem that is held on wide-stride RAID6 set? Not that bad because typically the journal is small enough to fit entirely in the control; /archives/xfs/2011-04/msg00426.html (9,109 bytes)
4. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>; Date: Sat, 30 Apr 2011 23:50:31 +0200; On one server (XENserver virtualized with ~14 VMs running Linux) which suffered from slow I/O on RAID-6 during heavy times, I upgraded the cache from 1G to 4G using an Areca ARC-1260 controller (some; /archives/xfs/2011-04/msg00429.html (9,665 bytes)
5. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: NeilBrown <neilb@xxxxxxx>; Date: Sun, 1 May 2011 08:27:17 +1000; On Sat, 30 Apr 2011 16:27:48 +0100 pg_xf2@xxxxxxxxxxxxxxxxxx (Peter Grandi) wrote: No. (patches welcome). 1 "PAGE" - normally 4K. The ideal config for a journalled filesystem is for put the journal o; /archives/xfs/2011-04/msg00430.html (11,577 bytes)
6. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>; Date: Sat, 30 Apr 2011 22:17:38 -0500; On 4/30/2011 4:50 PM, Michael Monnerie wrote: On Samstag, 30. April 2011 Stan Hoeppner wrote: Poor cache management, I'd guess, is one reason why you see Areca RAID cards with 1-4GB cache DRAM wherea; /archives/xfs/2011-04/msg00431.html (10,574 bytes)
7. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>; Date: Sun, 1 May 2011 11:11:52 +0200; Le Sat, 30 Apr 2011 14:54:02 -0500 vous écriviez: Yes, probably. To give some meat to the argument : Using XFS mounted nobarrier on an 8 drives RAID-6 array with WB cache : 30000 journal (file creati; /archives/xfs/2011-05/msg00003.html (8,661 bytes)
8. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>; Date: Sun, 1 May 2011 11:14:26 +0200; Le Sat, 30 Apr 2011 23:50:31 +0200 vous écriviez: As a side note, VMs typically creates lots of random small IOs, and perform quite poorly on RAID-6 arrays. -- -- Emmanuel Florac | Direction techniqu; /archives/xfs/2011-05/msg00004.html (8,410 bytes)
9. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: Dave Chinner <david@xxxxxxxxxxxxx>; Date: Sun, 1 May 2011 19:36:59 +1000; XFS will write log-stripe-unit sized records to disk. If the log buffers are not full, it pads them. Supported log-sunit sizes are up to 256k. Not bad at all, because the journal writes are sequentia; /archives/xfs/2011-05/msg00006.html (9,150 bytes)
10. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: pg_xf2@xxxxxxxxxxxxxxxxxx (Peter Grandi); Date: Sun, 1 May 2011 16:31:34 +0100; [ ... ] Ahhhm, but let me dig a bit deeper, even if it may be implied in the answer: would it be *possible*? That is, is the double parity scheme used in MS such that it is possible to "subtract" the; /archives/xfs/2011-05/msg00010.html (8,468 bytes)
11. Re: RAID6 r-m-w, op-journaled fs, SSDs (score: 1): Author: David Brown <david.brown@xxxxxxxxxxxx>; Date: Sun, 01 May 2011 20:32:22 +0200; * Can Linux MD do "abbreviated" read-modify-write RAID6 updates like for RAID5? [ ... ] No. (patches welcome). Ahhhm, but let me dig a bit deeper, even if it may be implied in the answer: would it b; /archives/xfs/2011-05/msg00018.html (10,816 bytes)

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