Re: Backup PC 4.0 Request
John Rouillard <[email protected]>
| Newsgroups | gmane.comp.sysutils.backup.backuppc.devel |
|---|---|
| Message-ID | <[email protected]> |
On Fri, Mar 04, 2011 at 04:48:57PM -0500, Jeffrey J. Kosowsky wrote: > It seems like there are two factors we are trying to capture > - Relative resource intensity of each client backup > - Interactions between subsets of clients > > It seems like we may need a concept both of 'grouping' and 'resource > intensity' > > In any case, if such changes are made, it would be worth it to think > through all the common use cases so that the structure agreed upon is > broad and flexible enough to capture them all. To handle this problem with my setup, I used a shell based semaphore system and DumpPreUserCmd. I keep overall concurrecy high (10), but each site has a semaphore with some number of resources (e.g. local lan links have 6 resources to it's site semaphore while WAN semaphores have 1 or 2 resources) and the number of resources limits the maximum number of backups that can run. So if one backup is running over the WAN to site A, and another site A host is scheduled by backuppc, the DumpPreUserCmd command tries to acquire a semaphore for site A. If no resources are available, the DumpPreUserCmd command exits with a non-zero exit status and the backup isn't started. I only have each host accessing one semaphore (based on the site) but there is no reason this couldn't be expanded to a host having to acquire multiple resources before the backup starts. So you could have a set of resource intensity resources as well as a grouping (site) set of semaphores. -- -- rouilj John Rouillard System Administrator Renesys Corporation 603-244-9084 (cell) 603-643-9300 x 111 ------------------------------------------------------------------------------ What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d _______________________________________________ BackupPC-devel mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-devel Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/