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setup: add the lazytime XFS version

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Starting with kernel 4.17 XFS will support the lazytime mount option.
That will be beneficial for Scylla as updating times synchronously is
one of our current sources of stalls.

Fortunately, older kernels are able to parse the option and just ignore
it. We verified that to be the case in a 4.15 kernel on ubuntu.
Therefore, just add the option unconditionally.

Signed-off-by: Glauber Costa <glauber@scylladb.com>
Message-Id: <20180920170017.13215-1-glauber@scylladb.com>
This commit is contained in:
Glauber Costa
2018-09-20 13:00:17 -04:00
committed by Avi Kivity
parent 0bf9a78c78
commit f828fe0d59
1 changed files with 2 additions and 2 deletions
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4
dist/common/scripts/scylla_raid_setup vendored
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@@ -128,7 +128,7 @@ if __name__ == '__main__':
f.write(res)
makedirs(mount_at)
run('mount -t xfs -o noatime {raid} "{mount_at}"'.format(raid=fsdev, mount_at=mount_at))
run('mount -t xfs -o noatime,lazytime {raid} "{mount_at}"'.format(raid=fsdev, mount_at=mount_at))
makedirs('{}/data'.format(root))
makedirs('{}/commitlog'.format(root))
@@ -146,7 +146,7 @@ if __name__ == '__main__':
match = re.search(r'^/dev/\S+: (UUID="\S+")', res.strip())
uuid = match.group(1)
with open('/etc/fstab', 'a') as f:
f.write('{uuid} {mount_at} xfs noatime,nofail 0 0\n'.format(uuid=uuid, mount_at=mount_at))
f.write('{uuid} {mount_at} xfs noatime,nofail,lazytime 0 0\n'.format(uuid=uuid, mount_at=mount_at))
mounts_conf = '/etc/systemd/system/scylla-server.service.d/mounts.conf'
if not os.path.exists(mounts_conf):
makedirs('/etc/systemd/system/scylla-server.service.d/')