Mandi! Cejka Rudolf via Bacula-users
In chel di` si favelave...
> - Spool Data = yes, attribute spooling is automatically enabled too
Done.
> In device storage section:
> - Maximum File Size = 32 GB, for LTO-6 and older you can think about 16 GB
i have:
Maximum File Size = 50G
> - Sufficient Maximum Job Spool Size or Maximum Spool Size, so overall write
> speed
> could be effective, I use 200 GB and 1000 GB
i have:
Maximum Spool Size = 400G
#Maximum Job Spool Size = 50G
> - Maximum Block Size = 262144 or 131072, for LTO-6 and older 65536 (this is
> tested
> on my FreeBSD system, Linux or another systems may need higher values - but
> do not
> use too big, because probability of write errors increases)
i have:
Maximum blocksize = 512K
> - SSD based disk spooling, M2 or SATA RAID
I've just tried with an dedicated SSD disk:
31-Jan 18:07 svpve3-sd JobId 16548: Committing spooled data to Volume
"SVPVE3_0003". Despooling 131,278,620,424 bytes ...
31-Jan 18:21 svpve3-sd JobId 16548: Despooling elapsed time = 00:14:22,
Transfer rate = 152.2 M Bytes/second
I've tried a quick fio test on SSD disk leading to:
root@svpve3:~# fio --name TEST --eta-newline=5s
--filename=/rpool-backup/bacula/spool/temp.file --rw=read --size=20g
--io_size=50g --blocksize=1024k --ioengine=libaio --fsync=10000 --iodepth=32
--direct=1 --numjobs=1 --runtime=60 --group_reporting
TEST: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T)
1024KiB-1024KiB, ioengine=libaio, iodepth=32
fio-3.12
Starting 1 process
TEST: Laying out IO file (1 file / 20480MiB)
Jobs: 1 (f=1): [R(1)][13.1%][r=521MiB/s][r=520 IOPS][eta 00m:53s]
Jobs: 1 (f=1): [R(1)][23.0%][r=521MiB/s][r=520 IOPS][eta 00m:47s]
Jobs: 1 (f=1): [R(1)][32.8%][r=520MiB/s][r=520 IOPS][eta 00m:41s]
Jobs: 1 (f=1): [R(1)][42.6%][r=522MiB/s][r=521 IOPS][eta 00m:35s]
Jobs: 1 (f=1): [R(1)][52.5%][r=520MiB/s][r=519 IOPS][eta 00m:29s]
Jobs: 1 (f=1): [R(1)][62.3%][r=520MiB/s][r=520 IOPS][eta 00m:23s]
Jobs: 1 (f=1): [R(1)][72.1%][r=521MiB/s][r=520 IOPS][eta 00m:17s]
Jobs: 1 (f=1): [R(1)][82.0%][r=521MiB/s][r=520 IOPS][eta 00m:11s]
Jobs: 1 (f=1): [R(1)][91.8%][r=521MiB/s][r=521 IOPS][eta 00m:05s]
Jobs: 1 (f=1): [R(1)][100.0%][r=520MiB/s][r=520 IOPS][eta 00m:00s]
TEST: (groupid=0, jobs=1): err= 0: pid=29942: Wed Jan 31 18:32:54 2024
read: IOPS=519, BW=520MiB/s (545MB/s)(30.5GiB/60061msec)
slat (usec): min=72, max=563, avg=113.95, stdev=17.64
clat (msec): min=2, max=120, avg=61.42, stdev= 1.93
lat (msec): min=2, max=120, avg=61.53, stdev= 1.93
clat percentiles (msec):
| 1.00th=[ 62], 5.00th=[ 62], 10.00th=[ 62], 20.00th=[ 62],
| 30.00th=[ 62], 40.00th=[ 62], 50.00th=[ 62], 60.00th=[ 62],
| 70.00th=[ 62], 80.00th=[ 62], 90.00th=[ 62], 95.00th=[ 62],
| 99.00th=[ 62], 99.50th=[ 63], 99.90th=[ 90], 99.95th=[ 106],
| 99.99th=[ 117]
bw ( KiB/s): min=487424, max=534528, per=100.00%, avg=532325.72,
stdev=4251.46, samples=120
iops : min= 476, max= 522, avg=519.83, stdev= 4.15, samples=120
lat (msec) : 4=0.01%, 10=0.01%, 20=0.02%, 50=0.07%, 100=99.83%
lat (msec) : 250=0.06%
cpu : usr=0.86%, sys=7.44%, ctx=31284, majf=7, minf=8203
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=99.8%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.1%, 64=0.0%, >=64=0.0%
issued rwts: total=31224,0,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=32
Run status group 0 (all jobs):
READ: bw=520MiB/s (545MB/s), 520MiB/s-520MiB/s (545MB/s-545MB/s), io=30.5GiB
(32.7GB), run=60061-60061msec
Disk stats (read/write):
sde: ios=31220/4, merge=0/1, ticks=1914913/325, in_queue=1872640, util=99.90%
So disk seems to perform at least 500MB/s on reading, but bacula still write
on tape at 150MB/s...
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