strict-o-direct just allows the app to define if direct I/O is needed and yes, that could be a reason for your data loss.
The good thing is that the feature is part of the virt group and there is a "Optimize for Virt" button somewhere in the UI . Yet, I prefer the manual approach of building gluster volumes ,as UI's primary focus is oVirt (quite natural , right). Best Regards, Strahil Nikolov В сряда, 14 октомври 2020 г., 12:30:42 Гринуич+3, Jarosław Prokopowski <[email protected]> написа: Thanks. I will get rid of multipath. I did not set performance.strict-o-direct specifically, only changed permissions of the volume to vdsm.kvm and applied the virt gourp. Now is see performance.strict-o-direct was off. Could it be the reason of the data loss? Direct I/O is enabled in oVirt by gluster mount option "-o direct-io-mode=enable" right? Below is full list of the volume options. Option Value ------ ----- cluster.lookup-unhashed on cluster.lookup-optimize on cluster.min-free-disk 10% cluster.min-free-inodes 5% cluster.rebalance-stats off cluster.subvols-per-directory (null) cluster.readdir-optimize off cluster.rsync-hash-regex (null) cluster.extra-hash-regex (null) cluster.dht-xattr-name trusted.glusterfs.dht cluster.randomize-hash-range-by-gfid off cluster.rebal-throttle normal cluster.lock-migration off cluster.force-migration off cluster.local-volume-name (null) cluster.weighted-rebalance on cluster.switch-pattern (null) cluster.entry-change-log on cluster.read-subvolume (null) cluster.read-subvolume-index -1 cluster.read-hash-mode 1 cluster.background-self-heal-count 8 cluster.metadata-self-heal off cluster.data-self-heal off cluster.entry-self-heal off cluster.self-heal-daemon on cluster.heal-timeout 600 cluster.self-heal-window-size 1 cluster.data-change-log on cluster.metadata-change-log on cluster.data-self-heal-algorithm full cluster.eager-lock enable disperse.eager-lock on disperse.other-eager-lock on disperse.eager-lock-timeout 1 disperse.other-eager-lock-timeout 1 cluster.quorum-type auto cluster.quorum-count (null) cluster.choose-local off cluster.self-heal-readdir-size 1KB cluster.post-op-delay-secs 1 cluster.ensure-durability on cluster.consistent-metadata no cluster.heal-wait-queue-length 128 cluster.favorite-child-policy none cluster.full-lock yes diagnostics.latency-measurement off diagnostics.dump-fd-stats off diagnostics.count-fop-hits off diagnostics.brick-log-level INFO diagnostics.client-log-level INFO diagnostics.brick-sys-log-level CRITICAL diagnostics.client-sys-log-level CRITICAL diagnostics.brick-logger (null) diagnostics.client-logger (null) diagnostics.brick-log-format (null) diagnostics.client-log-format (null) diagnostics.brick-log-buf-size 5 diagnostics.client-log-buf-size 5 diagnostics.brick-log-flush-timeout 120 diagnostics.client-log-flush-timeout 120 diagnostics.stats-dump-interval 0 diagnostics.fop-sample-interval 0 diagnostics.stats-dump-format json diagnostics.fop-sample-buf-size 65535 diagnostics.stats-dnscache-ttl-sec 86400 performance.cache-max-file-size 0 performance.cache-min-file-size 0 performance.cache-refresh-timeout 1 performance.cache-priority performance.cache-size 32MB performance.io-thread-count 16 performance.high-prio-threads 16 performance.normal-prio-threads 16 performance.low-prio-threads 32 performance.least-prio-threads 1 performance.enable-least-priority on performance.iot-watchdog-secs (null) performance.iot-cleanup-disconnected-reqsoff performance.iot-pass-through false performance.io-cache-pass-through false performance.cache-size 128MB performance.qr-cache-timeout 1 performance.cache-invalidation false performance.ctime-invalidation false performance.flush-behind on performance.nfs.flush-behind on performance.write-behind-window-size 1MB performance.resync-failed-syncs-after-fsyncoff performance.nfs.write-behind-window-size1MB performance.strict-o-direct off performance.nfs.strict-o-direct off performance.strict-write-ordering off performance.nfs.strict-write-ordering off performance.write-behind-trickling-writeson performance.aggregate-size 128KB performance.nfs.write-behind-trickling-writeson performance.lazy-open yes performance.read-after-open yes performance.open-behind-pass-through false performance.read-ahead-page-count 4 performance.read-ahead-pass-through false performance.readdir-ahead-pass-through false performance.md-cache-pass-through false performance.md-cache-timeout 1 performance.cache-swift-metadata true performance.cache-samba-metadata false performance.cache-capability-xattrs true performance.cache-ima-xattrs true performance.md-cache-statfs off performance.xattr-cache-list performance.nl-cache-pass-through false features.encryption off network.frame-timeout 1800 network.ping-timeout 42 network.tcp-window-size (null) client.ssl off network.remote-dio enable client.event-threads 4 client.tcp-user-timeout 0 client.keepalive-time 20 client.keepalive-interval 2 client.keepalive-count 9 network.tcp-window-size (null) network.inode-lru-limit 16384 auth.allow * auth.reject (null) transport.keepalive 1 server.allow-insecure on server.root-squash off server.all-squash off server.anonuid 65534 server.anongid 65534 server.statedump-path /var/run/gluster server.outstanding-rpc-limit 64 server.ssl off auth.ssl-allow * server.manage-gids off server.dynamic-auth on client.send-gids on server.gid-timeout 300 server.own-thread (null) server.event-threads 4 server.tcp-user-timeout 42 server.keepalive-time 20 server.keepalive-interval 2 server.keepalive-count 9 transport.listen-backlog 1024 transport.address-family inet performance.write-behind on performance.read-ahead off performance.readdir-ahead on performance.io-cache off performance.open-behind on performance.quick-read off performance.nl-cache off performance.stat-prefetch on performance.client-io-threads on performance.nfs.write-behind on performance.nfs.read-ahead off performance.nfs.io-cache off performance.nfs.quick-read off performance.nfs.stat-prefetch off performance.nfs.io-threads off performance.force-readdirp true performance.cache-invalidation false performance.global-cache-invalidation true features.uss off features.snapshot-directory .snaps features.show-snapshot-directory off features.tag-namespaces off network.compression off network.compression.window-size -15 network.compression.mem-level 8 network.compression.min-size 0 network.compression.compression-level -1 network.compression.debug false features.default-soft-limit 80% features.soft-timeout 60 features.hard-timeout 5 features.alert-time 86400 features.quota-deem-statfs off geo-replication.indexing off geo-replication.indexing off geo-replication.ignore-pid-check off geo-replication.ignore-pid-check off features.quota off features.inode-quota off features.bitrot disable debug.trace off debug.log-history no debug.log-file no debug.exclude-ops (null) debug.include-ops (null) debug.error-gen off debug.error-failure (null) debug.error-number (null) debug.random-failure off debug.error-fops (null) nfs.disable on features.read-only off features.worm off features.worm-file-level off features.worm-files-deletable on features.default-retention-period 120 features.retention-mode relax features.auto-commit-period 180 storage.linux-aio off storage.batch-fsync-mode reverse-fsync storage.batch-fsync-delay-usec 0 storage.owner-uid 36 storage.owner-gid 36 storage.node-uuid-pathinfo off storage.health-check-interval 30 storage.build-pgfid off storage.gfid2path on storage.gfid2path-separator : storage.reserve 1 storage.health-check-timeout 10 storage.fips-mode-rchecksum off storage.force-create-mode 0000 storage.force-directory-mode 0000 storage.create-mask 0777 storage.create-directory-mask 0777 storage.max-hardlinks 100 features.ctime on config.gfproxyd off cluster.server-quorum-type server cluster.server-quorum-ratio 0 changelog.changelog off changelog.changelog-dir {{ brick.path }}/.glusterfs/changelogs changelog.encoding ascii changelog.rollover-time 15 changelog.fsync-interval 5 changelog.changelog-barrier-timeout 120 changelog.capture-del-path off features.barrier disable features.barrier-timeout 120 features.trash off features.trash-dir .trashcan features.trash-eliminate-path (null) features.trash-max-filesize 5MB features.trash-internal-op off cluster.enable-shared-storage disable locks.trace off locks.mandatory-locking off cluster.disperse-self-heal-daemon enable cluster.quorum-reads no client.bind-insecure (null) features.shard on features.shard-block-size 64MB features.shard-lru-limit 16384 features.shard-deletion-rate 100 features.scrub-throttle lazy features.scrub-freq biweekly features.scrub false features.expiry-time 120 features.cache-invalidation off features.cache-invalidation-timeout 60 features.leases off features.lease-lock-recall-timeout 60 disperse.background-heals 8 disperse.heal-wait-qlength 128 cluster.heal-timeout 600 dht.force-readdirp on disperse.read-policy gfid-hash cluster.shd-max-threads 8 cluster.shd-wait-qlength 10000 cluster.locking-scheme granular cluster.granular-entry-heal no features.locks-revocation-secs 0 features.locks-revocation-clear-all false features.locks-revocation-max-blocked 0 features.locks-monkey-unlocking false features.locks-notify-contention no features.locks-notify-contention-delay 5 disperse.shd-max-threads 1 disperse.shd-wait-qlength 1024 disperse.cpu-extensions auto disperse.self-heal-window-size 1 cluster.use-compound-fops off performance.parallel-readdir off performance.rda-request-size 131072 performance.rda-low-wmark 4096 performance.rda-high-wmark 128KB performance.rda-cache-limit 10MB performance.nl-cache-positive-entry false performance.nl-cache-limit 10MB performance.nl-cache-timeout 60 cluster.brick-multiplex off cluster.max-bricks-per-process 250 disperse.optimistic-change-log on disperse.stripe-cache 4 cluster.halo-enabled False cluster.halo-shd-max-latency 99999 cluster.halo-nfsd-max-latency 5 cluster.halo-max-latency 5 cluster.halo-max-replicas 99999 cluster.halo-min-replicas 2 features.selinux on cluster.daemon-log-level INFO debug.delay-gen off delay-gen.delay-percentage 10% delay-gen.delay-duration 100000 delay-gen.enable disperse.parallel-writes on features.sdfs off features.cloudsync off features.ctime on ctime.noatime on feature.cloudsync-storetype (null) features.enforce-mandatory-lock off _______________________________________________ Users mailing list -- [email protected] To unsubscribe send an email to [email protected] Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/[email protected]/message/C5YTREAG33NRCDJ3CWX622GN3AZ6VTON/ 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