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Mark Knecht
Considering a complete rework of RAID on my home compute ...
Hi, I set up RAID using mdadm for the first time 8-9 months ago. As a complete newbie, of which class I still consider myself, I made a bunch of compromises at that time. I am now considering reworking the setup and am looking for some guidance. The system has 5 500GB WD RAID Edition drives. They are all the same model purchased at the same time so they are subject to some of the statistical problems that happen when one does this. The system runs MySQL in Linux and then (typically) ...
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Dec 29, 12:54 pm 2010
Wei Yongquan
[PATCH] Update CONFIG_MD_RAID6_PQ to CONFIG_RAID6_PQ in ...
Commit f5e70d0fe3ea990cfb3fc8d7f76a719adcb1e0b5 renamed MD_RAID6_PQ to RAID6_PQ, but iop-adma.c didn't update synchronously. Signed-off-by: Wei Yongquan <weiyqlq@gmail.com> --- drivers/dma/iop-adma.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c index 161c452..c6b01f5 100644 --- a/drivers/dma/iop-adma.c +++ b/drivers/dma/iop-adma.c @@ -1261,7 +1261,7 @@ out: return err; } -#ifdef ...
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Dec 29, 5:30 am 2010
Doug Dumitru
Raid/5 optimization for linear writes
Hello all, I have been using an in-house mod to the raid5.c driver to optimize for linear writes.  The optimization is probably too specific for general kernel inclusion, but I wanted to throw out what I have been doing in case anyone is interested. The application involves a kernel module that can produce precisely aligned, long, linear writes. In the case of raid-5, the obvious plan is to issue writes that are complete raid stripes of 'optimal_io_length'. Unfortunately, ...
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Dec 28, 8:38 pm 2010
Stan Hoeppner
Re: Is It Hopeless?
BTRFS? You must be pulling our chains. It's an experimental filesystem for Pete's sake. A month ago it still didn't have a check/repair tool. Does it yet? -- Stan --
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Dec 28, 8:04 pm 2010
Roman Mamedov
Re: Is It Hopeless?
On Tue, 28 Dec 2010 21:04:10 -0600 AFAIK it does have a check tool, but not a repair tool yet :) To be fair, it can be argued that if you have a backup [server], this doesn't matter too much. But personally I find btrfs to be good not for primary storage yet, but for precisely the mentioned backup storage: its snapshot feature allows to do (fast) incremental backups, while at the same time have the full state saved at each backup step instantly accessible with no special software ...
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Dec 28, 10:34 pm 2010
Neil Brown
Re: [PATCH 00/29] OLCE, migrations and raid10 takeover
On Tue, 28 Dec 2010 08:49:52 +0000 "Kwolek, Adam" <adam.kwolek@intel.com> I can see why you might want to avoid updating one array from a call to update a different array, but I think it is the correct thing to do in this case. What we are really doing here is changing the whole container (both arrays). We are making them both bigger in number of devices. The rules for updating the metadata require that this happens in multiple steps and at different times. One of the steps is that when the ...
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Dec 29, 3:34 am 2010
Kwolek, Adam
RE: [PATCH 00/29] OLCE, migrations and raid10 takeover
Thank you for information, I think I know everything what I need at this moment. In a few days, you'll get new patches for OLCE. BR Adam --
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Dec 29, 5:29 am 2010
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