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IDProjectCategoryView StatusLast Update
0001271bareos-core[All Projects] storage daemonpublic2020-09-08 23:16
ReporterkabassanovAssigned To 
PriorityhighSeveritymajorReproducibilityalways
Status newResolutionopen 
PlatformLinuxOSDebianOS Version10
Product Version19.2.8 
Fixed in Version 
Summary0001271: Btape speed tests with Bareos block structure have half of the Bacula throughput
DescriptionHello,

Some months ago I migrated a backup server from Bacula to Bareos.
I've just remarked that with btape tests (and real backups) write throughtput is decreased by about 50% when bareos block structure is used.
So I wonder if there is something wrong there... Like a bareos block structure that overlaps and needs 2 blocks while sending data to the drive?

Bacula:
----------

btape: btape.c:1062-0 Test with zero data, should give the maximum throughput.
btape: btape.c:911-0 Begin writing 3 files of 3.221 GB with raw blocks of 1048576 bytes.
btape: btape.c:385-0 Total Volume bytes=9.663 GB. Total Write rate = 508.6 MB/s

+++

btape: btape.c:1074-0 Test with random data, should give the minimum throughput.
btape: btape.c:911-0 Begin writing 3 files of 3.221 GB with raw blocks of 1048576 bytes.
btape: btape.c:385-0 Total Volume bytes=9.663 GB. Total Write rate = 214.7 MB/s

+++

btape: btape.c:1088-0 Test with zero data and bacula block structure.
btape: btape.c:966-0 Begin writing 3 files of 3.221 GB with blocks of 1048576 bytes.
btape: btape.c:385-0 Total Volume bytes=9.663 GB. Total Write rate = 536.8 MB/s

btape: btape.c:1100-0 Test with random data, should give the minimum throughput.
btape: btape.c:966-0 Begin writing 3 files of 3.221 GB with blocks of 1048576 bytes.
btape: btape.c:385-0 Total Volume bytes=9.663 GB. Total Write rate = 214.7 MB/s

Bareos:

btape: stored/btape.cc:1026-0 Test with zero data, should give the maximum throughput.
btape: stored/btape.cc:887-0 Begin writing 3 files of 3.221 GB with raw blocks of 1048576 bytes.
btape: stored/btape.cc:396-0 Total Volume bytes=9.663 GB. Total Write rate = 536.8 MB/s

+++

btape: stored/btape.cc:1038-0 Test with random data, should give the minimum throughput.
btape: stored/btape.cc:887-0 Begin writing 3 files of 3.221 GB with raw blocks of 1048576 bytes.
btape: stored/btape.cc:396-0 Total Volume bytes=9.663 GB. Total Write rate = 214.7 MB/s

+++

btape: stored/btape.cc:1052-0 Test with zero data and bareos block structure.
btape: stored/btape.cc:942-0 Begin writing 3 files of 3.221 GB with blocks of 1048576 bytes.
btape: stored/btape.cc:396-0 Total Volume bytes=9.663 GB. Total Write rate = 292.8 MB/s

+++

btape: stored/btape.cc:1064-0 Test with random data, should give the minimum throughput.
btape: stored/btape.cc:942-0 Begin writing 3 files of 3.221 GB with blocks of 1048576 bytes.
btape: stored/btape.cc:396-0 Total Volume bytes=9.663 GB. Total Write rate = 108.5 MB/s
TagsNo tags attached.
bareos-master: impact
bareos-master: action
bareos-19.2: impact
bareos-19.2: action
bareos-18.2: impact
bareos-18.2: action
bareos-17.2: impact
bareos-17.2: action
bareos-16.2: impact
bareos-16.2: action
bareos-15.2: impact
bareos-15.2: action
bareos-14.2: impact
bareos-14.2: action
bareos-13.2: impact
bareos-13.2: action
bareos-12.4: impact
bareos-12.4: action

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Issue History

Date Modified Username Field Change
2020-09-08 23:16 kabassanov New Issue