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тАО08-05-2004 07:55 AM
тАО08-05-2004 07:55 AM
I know that there has been a lot of discussion on this. But I was unable to find the perfect solution to my problem.
I've looked and tried a lot of solution that i've found. Maybe I've found the wrong posts or... i don't know... But anyway! Here's my info :
Filesystem Statistics:
Directories ........ 21791
Regular files ...... 571147
Symbolic links ..... 425
SYSV FIFOs ......... 0
BSD sockets ........ 0
Block Devices ...... 0
Character Devices .. 0
Unknown Objects .... 0
----------------------------
Objects Total ...... 593363
Kbytes Total ...... 71519261
Run Time ........... 4:41:15
Backup Speed ....... 4238,18 (KB/s)
4 hours for 70 gigs ? Normally its suppose to be like 60/70 gigs for 1 hour using a single drive ?
We have a HP LTO-2 using SCSI-2
I've seen post about Disk agents, buffers and stuff like that... nothing worked.
I know that the more files that we have that might impact on the backup performance.
But anyway, if anyone might have a little advice that would be great!
Thanks!
Solved! Go to Solution.
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тАО08-05-2004 08:02 AM
тАО08-05-2004 08:02 AM
Re: Poor performance
http://www6.itrc.hp.com/service/cki/search.do?category=c0&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty&searchString=UPERFKBAN00000726&search.y=8&search.x=28&mode=id&admit=1552802428+1091736050969+28353475&searchCrit=allwords
Attaching a script to help gather data for the doc.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО08-05-2004 08:05 AM
тАО08-05-2004 08:05 AM
Re: Poor performance
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тАО08-05-2004 08:30 AM
тАО08-05-2004 08:30 AM
Re: Poor performance
I'm going to read that right now!
To do the backups, i'm using Data Protector 5.1
on Windows.
The example of filesystem was from a drive for a Oracle instance.
But I get the same performance with other machines running on Unix or Windows.
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тАО08-05-2004 08:34 AM
тАО08-05-2004 08:34 AM
Re: Poor performance
I suspect that the fundamental bottleneck is that there not enough disk agents to keep the drive busy. Observe the tape drive while the backup is running. If the drive does not stream almost continuously then you are taking a huge (10-100X) performance hit compared with the throughput of a streaming device. OB2/DP really performs best with fast tape drives when multiple filesystems (in OB2 speak, objects) are feeding a common media agent. I suspect you could actually back 3 filesystems as fast as you back up the one. You might try the divide and conquer approach by using includes and excludes of different directories so that the same filesystem becomes different objects. You then make sure that the device concurrency is >= the number of objects.
The downside to the divide and conquer approach is that it is now rather eash to miss something when directories are added.
It also helps greatly if the disk agent and media agent are on the same host so that the network is not a bottleneck. Finally, you are backing up a fairly large number of files; each of these requires a database hit. A few large files will be much faster than many small files for the same total volume of data. The database under DP is improved considerably over that of OB2.
You might try reducing the logging level to "Log Directories" if you suspect that the database is a bottleneck.
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тАО08-05-2004 08:34 AM
тАО08-05-2004 08:34 AM
Re: Poor performance
And the script seems to be for a Unix machine.
I'm installed on a Windows machine.
Don't know if that makes a good difference on speed.
I know that when I was running with my AIT device on Unix with Networker the performance was okay. When we switched the AIT device to Data Protector under windows, the performance was decreased.
Don't know if that's still the case now.
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тАО08-05-2004 08:42 AM
тАО08-05-2004 08:42 AM
Re: Poor performance
Hardware compression
Concurrency 4
Block Size (Default)
Segment size 2000
Disk Agent 8
I have a MSL6030 with 2 LTO2 Drives.
The backup machine use the network at 100%.
The CPU Performance is okay, most of the time the machine is in idle at 90% (during backups).
How can I determine that the issue is with the database of DP ?
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тАО08-06-2004 02:01 AM
тАО08-06-2004 02:01 AM
Re: Poor performance
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тАО08-06-2004 02:22 AM
тАО08-06-2004 02:22 AM
Re: Poor performance
We are on 100Mbps.
When backing up 1 client, 1 big file, or even a disk i always get a network usage of about 30Mbps.
Since the drives are 30MBps, the network should be used at 100Mbps no ?
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тАО08-06-2004 03:29 AM
тАО08-06-2004 03:29 AM