Date: Tue, 6 Jan 1998 20:08:09 -0600 (CST) From: Font <font@Mcs.Net> To: questions@freebsd.org Subject: How best to speed up rdumps? Message-ID: <Pine.BSF.3.95.980106200115.21450B-100000@Mars.mcs.net>
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I'm dumping across a network to an Exabyte 8505, and while backups on the
FreeBSD 2.2.2+ machine seem to go at 300-600Kbyte/s typically, backups
across the network (from a 2.2.1R machine, so far) seem to only be getting
around 50Kbyte/s. The network is 10baseT with a smattering of 100baseTX,
and is fairly calm at the time of backup. The command I'm using is
dump 0auf tapeserverbox:/dev/nrst0 filesys
Should I be specifying a blocksize when doing backups over the network?
If so, how would I go about selecting an ideal blocksize? Would I need to
do several test dumps to determine this? Or should I be looking into
something else for the bottleneck?
The odd thing is, I did pretty much the same thing when backing up a
NEXTSTEP 3.3p1 box to a FreeBSD box, and was still able to get over
300 Kbyte/s. Admittedly it was a different and even less-loaded network
to a different tape drive (WangDAT 3400DX), but I guess I expected more
throughput between like systems.
A bug in my MUA causes news.announce.newusers font
to be sent to beneficiaries and senders of UCE/SPAM. @
mcs.net
Wishes are like dishes.
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