Hi
I have test bluestore on SSD, and I found that the BW from fio is about 40MB,
but
the write BW from iostat of SSD is about 400MB, nearly ten times.
Could someone help to explain this?
Thanks a lot.
Below are my configuration file:
[global]
fsid = 31e77e3c-447c-4745-a91a-58bda80a868c
enable experimental unrecoverable data corrupting features = bluestore
rocksdb
osd objectstore = bluestore
bluestore default buffered read = true
bluestore_min_alloc_size=4096
osd pool default size = 1
osd pg bits = 8
osd pgp bits = 8
auth supported = none
log to syslog = false
filestore xattr use omap = true
auth cluster required = none
auth service required = none
auth client required = none
public network = 192.168.200.233/24
cluster network = 192.168.100.233/24
mon initial members = node3
mon host = 192.168.200.233
mon data = /etc/ceph/mon.node3
filestore merge threshold = 40
filestore split multiple = 8
osd op threads = 8
debug_bluefs = "0/0"
debug_bluestore = "0/0"
debug_bdev = "0/0"
debug_lockdep = "0/0"
debug_context = "0/0"
debug_crush = "0/0"
debug_mds = "0/0"
debug_mds_balancer = "0/0"
debug_mds_locker = "0/0"
debug_mds_log = "0/0"
debug_mds_log_expire = "0/0"
debug_mds_migrator = "0/0"
debug_buffer = "0/0"
debug_timer = "0/0"
debug_filer = "0/0"
debug_objecter = "0/0"
debug_rados = "0/0"
debug_rbd = "0/0"
debug_journaler = "0/0"
debug_objectcacher = "0/0"
debug_client = "0/0"
debug_osd = "0/0"
debug_optracker = "0/0"
debug_objclass = "0/0"
debug_filestore = "0/0"
debug_journal = "0/0"
debug_ms = "0/0"
debug_mon = "0/0"
debug_monc = "0/0"
debug_paxos = "0/0"
debug_tp = "0/0"
debug_auth = "0/0"
debug_finisher = "0/0"
debug_heartbeatmap = "0/0"
debug_perfcounter = "0/0"
debug_rgw = "0/0"
debug_hadoop = "0/0"
debug_asok = "0/0"
debug_throttle = "0/0"
[osd.0]
host = node3
osd data = /etc/ceph/osd-device-0-data
bluestore block path = /dev/disk/by-partlabel/osd-device-0-block
bluestore block db path = /dev/disk/by-partlabel/osd-device-0-db
bluestore block wal path = /dev/disk/by-partlabel/osd-device-0-wal
[osd.1]
host = node3
osd data = /etc/ceph/osd-device-1-data
bluestore block path = /dev/disk/by-partlabel/osd-device-1-block
bluestore block db path = /dev/disk/by-partlabel/osd-device-1-db
bluestore block wal path = /dev/disk/by-partlabel/osd-device-1-wal
[osd.2]
host = node3
osd data = /etc/ceph/osd-device-2-data
bluestore block path = /dev/disk/by-partlabel/osd-device-2-block
bluestore block db path = /dev/disk/by-partlabel/osd-device-2-db
bluestore block wal path = /dev/disk/by-partlabel/osd-device-2-wal
[osd.3]
host = node3
osd data = /etc/ceph/osd-device-3-data
bluestore block path = /dev/disk/by-partlabel/osd-device-3-block
bluestore block db path = /dev/disk/by-partlabel/osd-device-3-db
bluestore block wal path = /dev/disk/by-partlabel/osd-device-3-wal
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