Please start any new threads on our new
site at https://forums.sqlteam.com. We've got lots of great SQL Server
experts to answer whatever question you can come up with.
| Author |
Topic |
|
Beacher
Starting Member
3 Posts |
 Posted - 2011-03-03 : 11:43:35
|
| I know backups over the network are not preferred, and nothing is guaranteed, however my DB restore of 180GB was going at 1.5MB/sec, (SQL Server 2005) yet if I transfer a file (from a windows share) it goes at 30MB/sec (1 GB file), all tests point to 30MB/sec, but as soon as SQL Server restore is involved, it snails along at 1.5MB/sec .. the backup of a database is fast (about 6 hours to backup, yet took 33 hours to restore).The server storing the backup (backed up to, and restored from) is the same, and both servers (the server backed up, and the server restored to) are blade's, both in the same enclosure, same SAN etc..Any suggestions on what I can look at that is causing this? Backing up and restoring over the network is the only option I have, the enclosure is USB 1.1, so I can't even back up to a USB drive.Thanks. |
|
|
tkizer
Almighty SQL Goddess
38200 Posts |
|
|
Beacher
Starting Member
3 Posts |
Posted - 2011-03-03 : 15:32:22
|
I haven't looked at compression, I'll look into it as a solution if I can't figure out this problem, but I don't understand why SQL would be so slow when all other services are flying over the network.What makes it even more confusing is the backup ran in 1/4 of the time as the restore took of that same backup. |
 |
|
|
tkizer
Almighty SQL Goddess
38200 Posts |
|
|
Beacher
Starting Member
3 Posts |
Posted - 2011-03-03 : 16:14:22
|
| My problem is it's impossible for me to do a local restore, there is not 180GB available on any disk, as well as I can't connect external storage (only USB 1.1 is available).I appreciate your suggestions, it looks like I'll look into compression for now, I'll keep poking around, I should think SQL Server doesn't need 28.5MB/sec in overhead for restoring, hopefully I can find some way to mitigate that. |
|
|
|
robvolk
Most Valuable Yak
15732 Posts |
Posted - 2011-03-03 : 16:50:09
|
quote:
I can't connect external storage (only USB 1.1 is available).
Even if you had USB 2.0, don't restore a database to an attached USB drive. The performance will still suck, and all you need is a bumped cable or drive to possibly corrupt your database.Is the drive you're restoring to fragmented? That could explain why it's so much slower. |
|
|
|
X002548
Not Just a Number
15586 Posts |
|
|
|
|
|
|
|
Restore over network going 12x slower