Mailinglist Archive: opensuse (671 mails)
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Re: [opensuse] Usging NILFS(2)
- From: Randall R Schulz <rschulz@xxxxxxxxx>
- Date: Sun, 12 Jun 2011 21:02:07 -0700
- Message-id: <201106122102.07446.rschulz@sonic.net>
On Sunday June 12 2011, Greg Freemyer wrote:
I realize I'm confusing myself. The requirements for /boot are unrelated
to it being on an SSD, since it's used so very little.
Root, however, must be optimized for SSD. ... Whatever that turns out to
mean. I'm still pretty short on those details.
The SSD I got is essentially a RAID 0 device, so none of the TRIM-based
solutions are relevant (at least that's what I've read in several
places, now). It's all on ITGC. I don't know if the "wiper" thing is
useful for this device.
OK. My research is ongoing.
Randall Schulz
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On Sun, Jun 12, 2011 at 7:23 PM, Randall R Schulz <rschulz@xxxxxxxxx>wrote:
On Sunday June 12 2011, Greg Freemyer wrote:
...
I'm a big fan of ext2 for /boot.
It is about as simple as it gets and everything out there can read
it.
But the boot / root volume is on SSD and I want to exploit it _and_
preserve maximum lifetime (or whatever tradeoff I can decide is
optimum between those to goals, to the extent they conflict).
I realize I'm confusing myself. The requirements for /boot are unrelated
to it being on an SSD, since it's used so very little.
Root, however, must be optimized for SSD. ... Whatever that turns out to
mean. I'm still pretty short on those details.
I updated http://en.opensuse.org/SDB:SSD_discard_%28trim%29_support
to talk about fstrim this afternoon. But I don't have any discussion
of a good choice for /boot.
Why don't you research the FITRIM ioctl as well as wiper.sh (from the
hdparm package). If either of them support ext2, I'd still go for
the simplicity of ext2 for /boot.
The SSD I got is essentially a RAID 0 device, so none of the TRIM-based
solutions are relevant (at least that's what I've read in several
places, now). It's all on ITGC. I don't know if the "wiper" thing is
useful for this device.
I believe both support ext4 and xfs at a minimum, but I don't know
about ext2 or ext3 for either.
Also, it could be that the ext4 filesystem driver when using the ext2
or ext3 on disk format will support one or both. This actually
sounds like a good question to take straight to the ext4 kernel
mailinglist. (Subscription NOT needed to post to it.)
If you find out any new info, please add it to the above page, or ask
me to.
OK. My research is ongoing.
Greg
Randall Schulz
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