09-11-2008 07:55 AM
All,
I need some help..I've tried everything and my next step is to call Symantec. I have a blade server connected to an LTO 3 HP tape blade. I use BE11D 7170 and backup two 900 Gig partitions that are on a SAN. The SAN is an HP EVA connected via Fibre. My 1 partition will backup in 10 hrs with a 1.5 GB throughput...that rocks! My other partition is running at 250-330 Meg/min and is taking about 50 hours to run! I cannot for the life of me figure out why. I've tweaked every backup setting I can think of..nothing helps. Now granted, the partition in question has more smaller files, but, I find it hard to belive it can take four to five times longer to backup. From the backup job log there are 2.8 million files/122,500 directories compared to the faster job which has 750,00 files/ 20,000 directories.
I checked and neither partition needs a defrag. Is there anything I can check as to why performance is sooo slow. At one time in the past both jobs ran the same amount of time..not sure what has changed.
Damian
09-12-2008 12:01 PM
Well masses of smaller files WILL backup slower than fewer large files, but a five times factor does seem a little extreme
Don't have any suggestions for you though, sorry
09-16-2008 10:39 AM
O.k...this weekend I go the job to 700 Meg/Minute and it finished in 21 hrs. I ran a 'quick erase' on the tape first. Has anyone else ever seen this before. I can't see how the erase would have speeded up the time from 50+ hrs to 21. But, this is how fast it ran months ago.
09-29-2008 06:36 AM
O.k..for 2 weeks the throughput doubled and the backup times were better. This week, back to taking forever to run. 1TB partition with lot of files took 48 hrs to run..350 Meg/Minute. Last week throughput showed 700 Meg a minute. My other 1TB partion with less files took 12 hrs to run at 1200 Meg/minute, but, last week that ran at 2500 Meg/minute. Anyone have any ideas???? I see nothing changed on our infrastructure side. I have no idea if this issue is with the software or our hardware/network.
Damian
02-03-2009 07:28 PM
Hi Damian,
Did you eventually find out why your backups were going slow ? Or did u find some way of reducing the backup time.
I have a similar scenario what 1.2TB with 2million files is taking over 24hrs to backup.
thanks