Backups on MSDP are slow (Slower than Tape)
Hi, I have an environment of Netbackup 7.5.0.4. The environment details are as: Master Server: IBM AIX 6.1, Netbackup 7.5.0.4 Media Server 1 (For AIX systems): IBM AIX 6.1, Netbackup 7.5.0.4 We have and MSDP pool on our media server of 20TB. The filesystem used for this MSDP pool is symantec. (vxfs) with bsize of 8192. The memory on the system is 120GB and it is an IBM Lpar of power7 with 5 CPUs. When i run backups on MSDP they are slower than the backups taken directly to tape. Considering the system memory and CPU, i dont think its a resources issue. It might be that netbackup needs some tuning to use these resources. I need help on tuning the netbackup MSDP for faster backups. I checked the value of MaxCacheSize in the file "/storage/pdc/etc/puredisk/contentrouter.cfg" and it is at 75% "MaxCacheSize=75%". Any help will be appreciated. Regards, Mohsin Mansoor1.6KViews0likes3CommentsNBU-Duplication issue
hi guys, i'm facing a strange issue when duplication images from my AdvDisk... if i run backup with my Netbackup 7.5.0.5 to Advdisk its successful and duplicating simultaniously to puredisk the performance is OK up to (87000KB/SEC) if i run backup with my Netbackup 7.5.0.5 to Advdisk its successful and duplicating simultaniously to tape LTO4 the performance is ok OK up to 70000KB/SEC) BUT if duplication to both PDDO and LTO4 in the same time the performance is 43 000 KB/SEC i spent many days reading the logs ( nbsl, nbpem, nbjm nbrb , nbstserv ,vxlogcfg etc ) i couldnt find any errors or a source limiting the performance all what seems to me strange is when writing to tape the bptm reporting in more than 300 lines : write_data: writing block shorter than BUFF_SIZE, 65536 bytes write_data: writing short block, 65536 bytes, remainder 0 seems it's related to what previously found : DUP_BLKSIZE ( in bptm) are by default set to 65536 (64K) so when we duplicate to tape the read requests pass the data in 64 , and the backups written to Advanced disk normally on the disk array the data is being written in 512K if it’s not more, if we will duplicate by passing data in 64K which is insufficient because it will require more (Input/Output Per Second) = the performance decreasing ….. IS it related ???? the Master is an AIX, Appliances 5220 any help sugesstion ? thank you in advance778Views0likes0Comments