Hello,
Does a high speed NVRAM device makes sense for Linux SW RAID? E.g. a PCI
card that exports battery backed memory.
Could that significantly improve write speed for RAID 5/6 (e.g. via an
external journal, asynchronous operation and write caching)?
What changes would be required?
Hello.
I'm using software raid with mdadm 1.7.0 on a mandrake linux 10.1, but
I'm facing heavy initialisation troubles. The first array /dev/md0 is
automatically created and launched at startup (though mdadm -As in init
scripts), but not the second array /dev/md1.
mdadm --examine --scan
Hello,
Given (what I imagine to be) the fairly common scenario of using an
md device as a PV for LVM and then using multiple LVs from that:
a) is there any benefit to altering the LV's extent size to match
the RAID stripe size?
b) is there any point in using the -E stride= option of mke2fs
On Fri, Feb 10, 2006 at 11:11:24AM +0100, Guillaume Rousse wrote:
Hello.
I'm using software raid with mdadm 1.7.0 on a mandrake linux 10.1, but
I'm facing heavy initialisation troubles. The first array /dev/md0 is
automatically created and launched at startup (though mdadm -As in init
scripts),
On Fri, Feb 10, 2006 at 10:01:09AM +0100, Mirko Benz wrote:
Does a high speed NVRAM device makes sense for Linux SW RAID? E.g. a PCI
card that exports battery backed memory.
Unless it's very large (i.e.: as large as one of your disks), it
doesn't make sense. It will probably break less often,
Erik Mouw wrote:
On Fri, Feb 10, 2006 at 10:01:09AM +0100, Mirko Benz wrote:
Does a high speed NVRAM device makes sense for Linux SW RAID? E.g. a PCI
card that exports battery backed memory.
Unless it's very large (i.e.: as large as one of your disks), it
doesn't make sense. It will
Jure Pečar wrote:
I too am running a jbod with md raid between two machines. So far md never
caused any kind of problems, altough I did have situations where both
machines were syncing mirrors at once.
If there's a little tool to reserve a disk via scsi, I'd like to know about
it too. Even a
Mirko Benz wrote:
Does a high speed NVRAM device makes sense for Linux SW RAID? E.g. a PCI
card that exports battery backed memory.
Sure. There are a couple ways I can think of using such a thing:
1) put an md intent bitmap on the NVRAM device for faster resyncs
2) use the NVRAM as a write
linas wrote:
On Tue, Jan 31, 2006 at 04:40:46PM +, Jason Lunz was heard to remark:
[EMAIL PROTECTED] said:
-- kernel scans /dev/hda1, looking for md superblock
-- kernel assembles devices according to info found in the superblocks
-- udev creates /dev/md0, etc.=20
The
One of the things I like about the IBM ServeRAID controller is spare
drive shared between two RAID groups. First to fail gets it. For
software RAID is this at all in the future?
--
bill davidsen [EMAIL PROTECTED]
CTO TMR Associates, Inc
Doing interesting things with small computers since
On Fri, 10 Feb 2006, Bill Davidsen wrote:
Erik Mouw wrote:
You could use it for an external journal, or you could use it as a swap
device.
Let me concur, I used external journal on SSD a decade ago with jfs (AIX). If
you do a lot of operations which generate journal entries, file
11 matches
Mail list logo
