Hi,

I have noticed that recover speed in general seems slower than backup
speed. We are primarily using LTO tape drives. Our drives have a max
sessions value of 5, so I don't think I'm multi-plexing too many
streams. The backups seem to run around 7-12 MB/sec, sometimes a little
slower, sometimes a little faster. Currently, we are running a saveset
recover for a particular file (total saveset size is around 9 GB). The
recover was started at 3:05 EST, and it's now 3:44 EST and only 2234 MB
has been recovered so far. I have seen it do as much as 20 MB/sec, but
if I do the math, I get an average speed thus far of a little less than
1 MB/sec. I can guarantee that if I was backing up even just this one
file system, I would be almost done by now. Any thoughts?

The affected library is a Storagetek L80 and is running on a storage
node server (Linux Redhat 7.2). We do have a proper /etc/stinit.def
file, and we don't see any errors relating to tape positioning by record
or block size error messages. Everything seems normal. Is this about
right for recover speed? Why is recover speed in general so much slower
than backup?

Thanks.

George

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