- 1. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 24 Jan 2011 10:25:02 -0500 (EST)
- So can anybody help answering these questions: - are there any special options when creating the RAID0 to make it perform faster for such a use case? - are there other tunables, any special MD / LV
- /archives/xfs/2011-01/msg00337.html (8,614 bytes)
- 2. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Wolfgang Denk <wd@xxxxxxx>
- Date: Mon, 24 Jan 2011 21:48:27 +0100
- Dear Justin Piszcz, Thanks a lot for the pointer. I will try this out. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirc
- /archives/xfs/2011-01/msg00338.html (8,924 bytes)
- 3. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Wolfgang Denk <wd@xxxxxxx>
- Date: Mon, 24 Jan 2011 22:57:13 +0100
- Dear Justin, For the record: I tested both the "delaylog" and "logbsize=262144" on two systems running Fedora 14 x86_64 (kernel version 2.6.35.10-74.fc14.x86_64). Test No. Mount options 1 rw,noatime
- /archives/xfs/2011-01/msg00339.html (15,964 bytes)
- 4. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Dave Chinner <david@xxxxxxxxxxxxx>
- Date: Tue, 25 Jan 2011 10:03:14 +1100
- Only 16 files? You need to test something that takes more than 5 milliseconds to run. Given that XFS can run at >20,000 creates/s for a single threaded sequential create like this, perhaps you should
- /archives/xfs/2011-01/msg00341.html (11,310 bytes)
- 5. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
- Date: Tue, 25 Jan 2011 08:39:00 +0100
- Le Tue, 25 Jan 2011 10:03:14 +1100 vous écriviez: IIRC this is 16 thousands of files. Though this is not enough, I generally use 80 to 160 for tests. -- -- Emmanuel Florac | Direction technique <eflo
- /archives/xfs/2011-01/msg00357.html (9,327 bytes)
- 6. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Dave Chinner <david@xxxxxxxxxxxxx>
- Date: Tue, 25 Jan 2011 19:36:43 +1100
- [ As a small note - if you are going to comment on the results table from a previous message, please don't cut it from your response. Context is important. I pasted the relevant part back in so i can
- /archives/xfs/2011-01/msg00358.html (11,403 bytes)
- 7. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Wolfgang Denk <wd@xxxxxxx>
- Date: Tue, 25 Jan 2011 13:45:09 +0100
- Dear Dave Chinner, Right. [Any way to avoid these, btw?] I got side-tracked by the comments about the new (to me) delaylog mount option to xfs; as the results were not exactly as exp[ected I though i
- /archives/xfs/2011-01/msg00377.html (10,731 bytes)
- 8. Re: Optimize RAID0 for max IOPS? (score: 1)
- Author: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
- Date: Tue, 25 Jan 2011 13:51:23 +0100
- Le Tue, 25 Jan 2011 13:45:09 +0100 Wolfgang Denk <wd@xxxxxxx> écrivait: Easy enough, use the "nobarrier" mount option. -- -- Emmanuel Florac | Direction technique <eflorac@xxxxxxxxxxxxxx> --
- /archives/xfs/2011-01/msg00378.html (10,246 bytes)
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