Hi, I recently came across an interesting task to configure storage for backup of a large number of block devices.
Every week we back up all the virtual machines in our cloud, so you need to be able to maintain thousands of backups and do it as quickly and efficiently as possible.
RAID5, RAID6 .
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Erasure Coding — RAID5, RAID6, . . erasure coding — minio.
DRAID — ZFS. RAIDZ DRAID parity block , .
Fujitsu Primergy RX300 S7 c Intel Xeon CPU E5-2650L 0 @ 1.80GHz, Samsung DDR3-1333 8Gb PC3L-10600R ECC Registered (M393B1K70DH0-YH9), Supermicro SuperChassis 847E26-RJBOD1, Dual LSI SAS2X36 Expander 45 Seagage ST6000NM0115-1YZ110 6TB .
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s3bench minio . .
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minio ext4 vs XFS. , XFS ext4.
Mdadm ZFS, gmelikov , ZFS :
xattr=sa atime=off recordsize=1M
ZFS .
DRAID RAIDZ, .
(special) ZIL (log) SSD. , ZIL SSDSC2KI128G8 100% , . , SSD-, , , , .
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DRAID2 c distributed spares:
pool: data
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
data ONLINE 0 0 0
draid2:3g:2s-0 ONLINE 0 0 0
sdy ONLINE 0 0 0
sdam ONLINE 0 0 0
sdf ONLINE 0 0 0
sdau ONLINE 0 0 0
sdab ONLINE 0 0 0
sdo ONLINE 0 0 0
sdw ONLINE 0 0 0
sdak ONLINE 0 0 0
sdd ONLINE 0 0 0
sdas ONLINE 0 0 0
sdm ONLINE 0 0 0
sdu ONLINE 0 0 0
sdai ONLINE 0 0 0
sdaq ONLINE 0 0 0
sdk ONLINE 0 0 0
sds ONLINE 0 0 0
sdag ONLINE 0 0 0
sdi ONLINE 0 0 0
sdq ONLINE 0 0 0
sdae ONLINE 0 0 0
sdz ONLINE 0 0 0
sdan ONLINE 0 0 0
sdg ONLINE 0 0 0
sdac ONLINE 0 0 0
sdx ONLINE 0 0 0
sdal ONLINE 0 0 0
sde ONLINE 0 0 0
sdat ONLINE 0 0 0
sdaa ONLINE 0 0 0
sdn ONLINE 0 0 0
sdv ONLINE 0 0 0
sdaj ONLINE 0 0 0
sdc ONLINE 0 0 0
sdar ONLINE 0 0 0
sdl ONLINE 0 0 0
sdt ONLINE 0 0 0
sdah ONLINE 0 0 0
sdap ONLINE 0 0 0
sdj ONLINE 0 0 0
sdr ONLINE 0 0 0
sdaf ONLINE 0 0 0
sdao ONLINE 0 0 0
sdh ONLINE 0 0 0
sdp ONLINE 0 0 0
sdad ONLINE 0 0 0
spares
s0-draid2:3g:2s-0 AVAIL
s1-draid2:3g:2s-0 AVAIL
errors: No known data errors
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Benji Backup — Backy2, , Ceph. diff' . , S3. - . : python, cli.
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In this screencast you can see how the 10-gigabit channel is completely utilized during several backup operations that are simultaneously running. It is worth noting that disk utilization does not rise above 30%.
I was more than satisfied with the solution I received!