On 7/25/06, John Campbell <[EMAIL PROTECTED]> wrote:
In all of this, isn't the UNIONFS still a live deal? If as many client systems as possible use a set of backing F/Ss that are Read Only, wouldn't
Yes, it's mostly working. I have done quite a lot with it on s390. You probably don't want to use it for all your data (for performance reasons) but just for parts of the file system that are mostly unmodified (like /etc). I would not use it for all data on the system though. With unionfs you can put a sparse R/W file system on top and have the modified files reside on some private R/W disk. Because that R/W disk still is a real file system, you could sort of run a file level backup of that disk outside the unionfs. For a stable backup you would have the issues we discussed in this thread though. But you could even put a temporary R/W layer on top and divert all writes to that layer, backup the (now frozen) first R/W layer, and then merge any updates during the backup back into the first R/W layer. This is neat because it's file level, but there may be a performance issue when files need to be copied up. Rob -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
