On Mon, Jan 16, 2006 at 05:59:09PM -0600, Carl Wilhelm Soderstrom wrote: > if the client's swap space is heavily used, it will kill performance.
yup > Accesses to disk will often end up being at least 2x as expensive; since > memory in use must be written to swap in order to free space in RAM to read > new stuff in from disk. So every read of new data from disk also invokes at > least a write operation. assuming that swap is on the same disk as data, i think it could potentially be more like 10x or 100x. it's not just the extra reads and writes to and from the swap partition - it's also the extra seeks back and forth. those are very expensive. > get more RAM. Everyone will thank you for it. and/or divide the backup set into multiple pieces. Rsync's memory usage rises more or less linearly with the number of files being backed up. danno -- dan pritts - systems administrator - internet2 734/352-4953 office 734/834-7224 mobile ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
