On Sun, Nov 11, 2012 at 2:56 AM, j. van den hoff <[email protected]>wrote:
> On Sun, 11 Nov 2012 10:39:27 +0100, Matt Welland <[email protected]> > wrote: > > sshfs is cool but in a corporate environment it can't always be used. For >> example fuse is not installed for end users on the servers I have access >> to. >> >> I would also be very wary of sshfs and multi-user access. Sqlite3 locking >> on NFS doesn't always work well, I imagine that locking issues on sshfs >> > > it doesn't? in which way? and are the mentioned problems restricted to NFS > or other file systems (zfs, qfs, ...) as well? > do you mean that a 'central' repository could be harmed if two users try > to push at the same time (and would corruption propagate to the users' > "local" repositories later on)? I do hope not so... I should have qualified that with the detail that historically NFS locking has been reported as an issue by others but I myself have not seen it. What I have seen in using sqlite3 and fossil very heavily on NFS is users using kill -9 right off the bat rather than first trying with just kill. The lock gets stuck "set" and only dumping the sqlite db to text and recreating it seems to clear the lock (not sure but maybe sometimes copying to a new file and moving back will clear the lock). I've seen a corrupted db once or maybe twice but never been clear that it was caused by concurrent access on NFS or not. Thankfully it is fossil and recovery is a "cp" away. Quite some time ago I did limited testing of concurrent access to an sqlite3 db on AFS and GFS and it seemed to work fine. The AFS test was very slow but that could well be due to my being clueless on how to correctly tune AFS itself. When you say zfs do you mean using the NFS export functionality of zfs? I've never tested that and it would be very interesting to know how well it works. My personal opinion is that fossil works great over NFS but would caution anyone trying it to test thoroughly before trusting it. > > could well be worse. >> >> sshfs is an excellent work-around for an expert user but not a replacement >> for the feature of ssh transport. >> > > yes I would love to see a stable solution not suffering from interference > of terminal output (there are people out there loving the good old > `fortune' as part of their login script...). > > btw: why could fossil not simply(?) filter a reasonable amount of terminal > output for the occurrence of a sufficiently strong magic pattern indicating > that the "noise" has passed by and fossil can go to work? right now putting > `echo " "' (sending a single blank) suffices to let the transfer fail. my > understanding is that fossil _does_ send something like `echo test' (is > this true). all unexpected output to tty from the login scripts would come > _before_ that so why not test for receiving the expected text ('test' just > being not unique/strong enough) at the end of whatever is send (up to a > reasonable length)? is this a stupid idea? I thought of trying that some time ago but never got around to it. Inspired by your comment I gave a similar approach a quick try and for the first time I saw ssh work on my home linux box!!! All I did was read and discard any junk on the line before sending the echo test: http://www.kiatoa.com/cgi-bin/fossils/fossil/fdiff?v1=935bc0a983135b26&v2=61f9ddf1e2c8bbb0 ===========without========== rm: cannot remove `*': No such file or directory make: Nothing to be done for `all'. ssh matt@xena Pseudo-terminal will not be allocated because stdin is not a terminal. ../fossil: ssh connection failed: [Welcome to Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-32-generic-pae i686) * Documentation: https://help.ubuntu.com/ 0 packages can be updated. 0 updates are security updates. test] ==============with=============== fossil/junk$ rm *;(cd ..;make) && ../fossil clone ssh://matt@xena//home/matt/fossils/fossil.fossil fossil.fossil make: Nothing to be done for `all'. ssh matt@xena Pseudo-terminal will not be allocated because stdin is not a terminal. Bytes Cards Artifacts Deltas Sent: 53 1 0 0 Received: 5004225 13950 1751 5238 Sent: 71 2 0 0 Received: 5032480 9827 1742 3132 Sent: 57 93 0 0 Received: 5012028 9872 1137 3806 Sent: 57 1 0 0 Received: 4388872 3053 360 1168 Total network traffic: 1037 bytes sent, 19438477 bytes received Rebuilding repository meta-data... 100.0% complete... project-id: CE59BB9F186226D80E49D1FA2DB29F935CCA0333 server-id: 3029a8494152737798f2768c7991921f2342a84b admin-user: matt (password is "7db8e5") > > > >> >> >> >> On Sun, Nov 11, 2012 at 2:01 AM, Ramon Ribó <[email protected]> wrote: >> >> >>> > Sshfs didn't fix the problems that I was having with fossil+ssh, or at >>> least >>> > only did so partially. >>> >>> Why not? In what sshfs failed to give you the equivalent functionality >>> than a remote access to a fossil database through ssh? >>> >>> >>> >>> 2012/11/11 Timothy Beyer <[email protected]> >>> >>> At Sat, 10 Nov 2012 22:31:57 +0100, >>>> j. van den hoff wrote: >>>> > >>>> > thanks for responding. >>>> > I managed to solve my problem in the meantime (see my previous mail in >>>> > this thread), but I'll make a memo of sshfs and have a look at it. >>>> > >>>> > joerg >>>> > >>>> >>>> Sshfs didn't fix the problems that I was having with fossil+ssh, or at >>>> least only did so partially. Though, the problems that I was having >>>> with >>>> ssh were different. >>>> >>>> What I'd recommend doing is tunneling http or https through ssh, and >>>> host >>>> all of your fossil repositories on the host computer on your web server >>>> of >>>> choice via cgi. I do that with lighttpd, and it works flawlessly. >>>> >>>> Tim >>>> ______________________________**_________________ >>>> fossil-users mailing list >>>> [email protected].**org <[email protected]> >>>> http://lists.fossil-scm.org:**8080/cgi-bin/mailman/listinfo/** >>>> fossil-users<http://lists.fossil-scm.org:8080/cgi-bin/mailman/listinfo/fossil-users> >>>> >>>> >>> >>> ______________________________**_________________ >>> fossil-users mailing list >>> [email protected].**org <[email protected]> >>> http://lists.fossil-scm.org:**8080/cgi-bin/mailman/listinfo/** >>> fossil-users<http://lists.fossil-scm.org:8080/cgi-bin/mailman/listinfo/fossil-users> >>> >>> >>> > > -- > Using Opera's revolutionary email client: http://www.opera.com/mail/ > ______________________________**_________________ > fossil-users mailing list > [email protected].**org <[email protected]> > http://lists.fossil-scm.org:**8080/cgi-bin/mailman/listinfo/**fossil-users<http://lists.fossil-scm.org:8080/cgi-bin/mailman/listinfo/fossil-users> >
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