Re: snapshot, checkpoints
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hans Reiser wrote: [...] | Yes, views are an important step towards Filesystem-based cvs, see | clearcase as an example. Transaction infrastructure, substantially url please? Or I'll google. | Currently we support atomic sets of fs operations, although this is | immature code (meaning reiser4 works reliably but the api is still in | progress, etc.). I think this can actually be done in userland, outside (on top of) the fs. That's not the better way, just something practical for people who don't want to wait for (or use) the new api. -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iQIVAwUBQMoecHgHNmZLgCUhAQKIAA/9GWZBmn9rFL4QYfPNr5UpMQz0e6s1Aor/ LDFu/CDKcb2KnRAkGdoxCKr2WdxvPPUxieUNXQAdpEejn1SQ+6mSTzE0HRzab1HJ +O95bseF3eSb+mLiFC7CepQoviXUb/w1lzRww5v0f4s8biXv60qdkq+ZSK4a8CWP PD/sB4S0prfK/y/k+mSRAqFBZzxohnmK03Iz3qbaN8MrRsP7Thns+DEIG6RuzKoz H+fYwvUDUszkHXSG3CbyWUPSIT613lHcDbtfL52wpK+3722BM1hbiIw+aob07GIg UwFgXD6Okhy6BURNQykbmu2uHQYKQSd+zRZujd/b6QoWGGFe75cUlTUTdxawUUsM vvVQ6M7FN8BQ5Lj+/Oqtt8A9hjjMVIulJsP4zzxWrLpc8+JPi2WnO/x+beGVSbob kfqvN8eHMpgwkqVl4wtyIQ+yuDxtLcfYIjyp7BLW82wuXRhMt5jwgzw/FUgmfiAI O3VD2Bjbb8ndNFl++R29AQKtt9+n8od2vlLXLPK+/7hpSH82ymDXlA22/a8nekgk ofhwYQYYWI+z7YAS6nyMtXvxK79Cr9ep1lGsc+aEZGeu1mJorJ6WMI3kNsw8a+nT Mx2ntBJeI8YV7XPjQVKZb7Bz5DipUklrMkfrmrgQwOvwAKpY/BQwa2970myx6hJd hQlzWDXy27g= =CA6N -END PGP SIGNATURE-
Re: snapshot, checkpoints
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hans Reiser wrote: | Pierre Etchemaite wrote: | | Le Wed, 09 Jun 2004 17:21:58 -0500, David Masover [EMAIL PROTECTED] a | écrit : | | | | Good, then we don't have to immediately rewrite the wheel. But I still | would rather that we do this eventually. My concept has the changes | stored on the same partition, seems like it may be faster, and opens the | door for a filesystem-based cvs. | | | This phrase made me thing you might want to be aware of | http://www.namesys.com/blackbox_security.html which got darpa funding | recently Looks cool, I sort of understand it, but what's it got to do with what I said? What phrase? Filesystem-based cvs? -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iQIVAwUBQMjdc3gHNmZLgCUhAQIBjBAAj1Dul0IWoyvTcyEHgg7471Gl0nEl+A/D ROukc6UnQ0o/rVHAfjV/5GoqzBFIDXhBUOjMlAnyL908SJleyEt0CHuuBKiswGq/ 9Y+Ymac/WDz/+v6oAo1pGHswPui8H17ubEnh8hrK6Y9GKC15nANY2kLtz3f+fzVC aJAq2pGCbC/gJcRJR7tkM2ADH3tgtwFuWJdJWbnOxJvrSkUF/TVxuysROTmEDqiv FtH3UMlyAbxxH7ZJEl5HR8pARmqejJAM4L6kFLHEWva577tkwrxhUu+w7A4gSGbE vjM3zhm95TTS/fuUqJnw7cvr4t/TkFj5Lh3A0+0UQmhSdx/rPEwKYRR6ff8VzWyU T7dNSsdkQvxO+W6uZf9HDdwZta9+emIakTxq8H25pnBmdOoGGq1PyEQ/DhfuVuTI 3o+idHRs7n+bzUBEkwRhZ2UkWSrpIsCwrq0e2otfosDaA3psTTi/W5rtrOFPOouD 8amdOZv0h8vV6tpD8P4kbIA5JA+aN0UEA4iWhS5Df6XOouJe5ZNAAdOL/plW1Vzq X6D1LGzwv0RzxKwz0677xCyeuliTY5+heIpXJQ3Wx+TCdHY9akJQpYJsJxkwiSN5 LB5RoMJFDsEfcvMv5sG8j5qqTUJx9zmrzCpZgvRThyxGAMBavb2/ZcVmU1rzf4+G 6LwUWmAi3Gw= =Wfv6 -END PGP SIGNATURE-
Re: snapshot, checkpoints
David Masover wrote: Hans Reiser wrote: | Pierre Etchemaite wrote: | | Le Wed, 09 Jun 2004 17:21:58 -0500, David Masover [EMAIL PROTECTED] a | écrit : | | | | Good, then we don't have to immediately rewrite the wheel. But I still | would rather that we do this eventually. My concept has the changes | stored on the same partition, seems like it may be faster, and opens the | door for a filesystem-based cvs. | | | This phrase made me thing you might want to be aware of | http://www.namesys.com/blackbox_security.html which got darpa funding | recently Looks cool, I sort of understand it, but what's it got to do with what I said? What phrase? Filesystem-based cvs? Yes, views are an important step towards Filesystem-based cvs, see clearcase as an example. Transaction infrastructure, substantially present in reiser4 (see our (long) main page on reiser4 design, somewhere near the middle I think), is also an important component. Currently we support atomic sets of fs operations, although this is immature code (meaning reiser4 works reliably but the api is still in progress, etc.).
Re: snapshot, checkpoints
Le Wed, 09 Jun 2004 17:21:58 -0500, David Masover [EMAIL PROTECTED] a écrit : Good, then we don't have to immediately rewrite the wheel. But I still would rather that we do this eventually. My concept has the changes stored on the same partition, seems like it may be faster, and opens the door for a filesystem-based cvs. Look for copy-on-write links (cow links for short) in archives, or with Google; You'll find many hits, including a message from 2000 suggesting the idea has been around since at least 1997...
Re: snapshot, checkpoints
Pierre Etchemaite wrote: Le Wed, 09 Jun 2004 17:21:58 -0500, David Masover [EMAIL PROTECTED] a écrit : Good, then we don't have to immediately rewrite the wheel. But I still would rather that we do this eventually. My concept has the changes stored on the same partition, seems like it may be faster, and opens the door for a filesystem-based cvs. This phrase made me thing you might want to be aware of http://www.namesys.com/blackbox_security.html which got darpa funding recently Look for copy-on-write links (cow links for short) in archives, or with Google; You'll find many hits, including a message from 2000 suggesting the idea has been around since at least 1997...
Re: snapshot, checkpoints
On Thu, 27 May 2004 12:27:27 +0300, Markus TXrnqvist [EMAIL PROTECTED] wrote: On Thu, May 27, 2004 at 11:03:14AM +0400, Vladimir Saveliev wrote: On Thu, 2004-05-27 at 10:52, Timothy Webster wrote: Does reiserfs4 include features to allow vxfs like checkpoints or netapps snapshots? no Can't the same functionality be created with device mapper though? At least under linux anyway? Cheers, Paul
Re: snapshot, checkpoints
On Fri, 04 Jun 2004 13:10:05 +0200, Paul Wagland said: Can't the same functionality be created with device mapper though? At least under linux anyway? You'd need 2 things: 1) *very* recent patched device mapper (I think patches for snapshot support went by on LKML just day before yesterday or so). 2) You also need a suitable write-barrier interlock to the filesystem, to basically force a flush-to-disk of all the incore data buffers, etc (basically, you need to ensure that at the instant the snapshot is taken, the on-disk copy is clean by fsck standards). At that point, you can just have a utility that goes flush; snapshot; and go on your way. pgpMb3KdlRYDW.pgp Description: PGP signature
snapshot, checkpoints
Does reiserfs4 include features to allow vxfs like checkpoints or netapps snapshots? Thanks in advance. -tim __ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/
Re: snapshot, checkpoints
Hello On Thu, 2004-05-27 at 10:52, Timothy Webster wrote: Does reiserfs4 include features to allow vxfs like checkpoints or netapps snapshots? no Thanks in advance. -tim __ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/
Re: snapshot, checkpoints
On Thu, May 27, 2004 at 11:03:14AM +0400, Vladimir Saveliev wrote: On Thu, 2004-05-27 at 10:52, Timothy Webster wrote: Does reiserfs4 include features to allow vxfs like checkpoints or netapps snapshots? no I am not familiar with these mechanisms, would someone care to ellaborate a bit? I can't really even hazard a guess on what a filesystem snapshot or checkpoint might be, but it sounds like a backup of the file system. Or maybe just a journal state... Thanks -- mjt
Re: snapshot, checkpoints
Am Do, den 27.05.2004 schrieb Markus Törnqvist um 11:27: On Thu, May 27, 2004 at 11:03:14AM +0400, Vladimir Saveliev wrote: On Thu, 2004-05-27 at 10:52, Timothy Webster wrote: Does reiserfs4 include features to allow vxfs like checkpoints or netapps snapshots? no I am not familiar with these mechanisms, would someone care to ellaborate a bit? I can't really even hazard a guess on what a filesystem snapshot or checkpoint might be, but it sounds like a backup of the file system. Or maybe just a journal state... Hi, simply read these paragraphs: http://www.netapp.com/tech_library/3002.html#I34 -- Heinz-Josef Claes [EMAIL PROTECTED] project: http://sourceforge.net/projects/storebackup - snapshot-like backup to another disk
