Hi all,
I'm using CephFS on Hammer and I've 1.5 million files , 2 metadata servers in
active/standby configuration with 8 GB of RAM , 20 clients with 2 GB of RAM
each and 2 OSD nodes with 4 80GB osd and 4GB of RAM.
?I've noticed that if I kill the active metadata server the second one took
about 10 to 30 minutes to switch from rejoin to active state.On the rejoin
server while that is in rejoin state I can see ceph allocating RAM.
Here my configuration:
[global]
fsid = 2de7b17f-0a3e-4109-b878-c035dd2f7735
mon_initial_members = cephmds01
mon_host = 10.29.81.161
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
public network = 10.29.81.0/24
tcp nodelay = true
tcp rcvbuf = 0
ms tcp read timeout = 600
#Capacity
mon osd full ratio = .95
mon osd nearfull ratio = .85
[osd]
osd journal size = 1024
journal dio = true
journal aio = true
osd op threads = 2
osd op thread timeout = 60
osd disk threads = 2
osd recovery threads = 1
osd recovery max active = 1
osd max backfills = 2
# Pool
osd pool default size = 2
#XFS
osd mkfs type = xfs
osd mkfs options xfs = "-f -i size=2048"
osd mount options xfs = "rw,noatime,inode64,logbsize=256k,delaylog"
#FileStore Settings
filestore xattr use omap = false
filestore max inline xattr size = 512
filestore max sync interval = 10
filestore merge threshold = 40
filestore split multiple = 8
filestore flusher = false
filestore queue max ops = 2000
filestore queue max bytes = 536870912
filestore queue committing max ops = 500
filestore queue committing max bytes = 268435456
filestore op threads = 2
[mds]
max mds = 1
mds cache size = 250000
client cache size = 1024
mds dir commit ratio = 0.5
Best regards,
Matteo
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