Il 20-01-2020 16:30 Gionatan Danti ha scritto:
So, I have some questions: - why performance are so low with fsync? - why do I have so low IOPs (20/30) for minutes? - what is capping the non-fsync test? - why both glusterd and glusterfd are so CPU intensive? I can understand glusterfd itself requiring more CPU, but glusterd should only manage the other processes and send the volume information to asking client, right?
An update: the very low IOPs were caused by TCP retransmission on one of the two boxes. After that problem was fixed, no such low performance was recorded.
I also think that the non-fsync tests, with about 5000 IOPs, are cappaed by the 1000BaseT round trip time.
Some questions remain: - why performance are so low with fsync? (about 250 IOPs) - why both glusterd and glusterfd are so CPU intensive? Thanks. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx GPG public key ID: FF5F32A8 ________ Community Meeting Calendar: APAC Schedule - Every 2nd and 4th Tuesday at 11:30 AM IST Bridge: https://bluejeans.com/441850968 NA/EMEA Schedule - Every 1st and 3rd Tuesday at 01:00 PM EDT Bridge: https://bluejeans.com/441850968 Gluster-users mailing list Gluster-users@xxxxxxxxxxx https://lists.gluster.org/mailman/listinfo/gluster-users
