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Hi, we have multiple clusters of GlusterFS which are mostly alike. The typical setup is as such: -
Cluster of 3 nodes -
Replication factor of 3 -
Each node has 1 brick, mounted on XFS with RELATIME and NODIRATIME -
Each node has 8 disks in RAID 0 hardware The main problem we are facing is that observation of the access time of a file on the volume will update the access time. The steps to reproduce the problem are: -
Create a file (echo ‘some data’ > /mnt/gv0/file) -
Touch its mtime and atime to some past date (touch –d 19700101 /mnt/gv0/file) -
Touch its mtime to the current timestamp (touch –m /mnt/gv0/file) -
Stat the file until atime is updated (stat /mnt/gv0/file)
o
Sometimes it’s instant, sometimes it requires to execute the above command a couple of time On the IRC channel, I spoke to a developer (nickname ndevos) who said that it might be a getxattr() syscall that could be called when stat() is called on a replicated volume. Anybody can reproduce this issue? Is it a bug, or is it working as intended? Is there any workaround? Thank you, Simon |
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