Re: [Asterisk-Users] Voicemail with NFS
On Saturday 17 June 2006 10:03, Douglas Garstang wrote: Yes, we'd need it on every single box. We had a dedicated voicemail server in the first place. I decided to distribute voicemail between all boxes because the script that I had that copied the phone registrations over to the voicemail server (for mwi) was unreliable. How are you able to copy the phone registrations accross Asterisk servers? Or am I misunderstanding? Mike ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
On Sat, Jun 17, 2006 at 09:31:54PM -0500, Aaron Daniel wrote: On Sat, 17 Jun 2006, Douglas Garstang wrote: Other applications can handle it. Don't see why Asterisk can't. Mount the nfs volume with the -soft option. Do a 'df -k' and you will see that the df command will time out in a couple of seconds. Why can't Asterisk do the same? Just gonna throw gas on the fire. df -h doesn't continuously poll the drive for data, asterisk is (for mwi). So each timeout turns into another timeout. Didn't you already test changing the time on checkmwi? And did it not change the behavior (not necessarily for the better)? Your theory is easy to check with watching the state of the main asterisk thread, or maybe strace -p MAIN_ASTERISK_PID . If it remains hung constantly in a D state on the same system call, a shorter timeout just wouldn't have helped. -- Tzafrir Cohen sip:[EMAIL PROTECTED] icq#16849755 iax:[EMAIL PROTECTED] +972-50-7952406 [EMAIL PROTECTED] http://www.xorcom.com ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
On Saturday 17 June 2006 01:55, Tzafrir Cohen wrote: On Fri, Jun 16, 2006 at 09:40:35AM -0600, Mike Diehl wrote: I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. The voicemail code assumes some locking semantics supported by the filesystem (sysv locks?) That's a relief. I always hope programs are smart enough to lock files they change. What happens when you sync a locked file? Then the lockfile will be created and deleted on the backup server as well. Since we kind of assume a master/slave situation with the two vm systems, I think this should work? But talk is cheap and I've not done this, yet. On the other hand, you might use the external notification option in voicemailmain to initiate the sync Isnt there a problem with samba with the very same issue? Not sure. I only minimally support samba these days. Hope this helps, Mike. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
On Fri, Jun 16, 2006 at 02:17:53PM -0600, Douglas Garstang wrote: I have /var/spool/asterisk/voicemail NFS mounted from another server. Everything is fine, until I simulate an NFS server failure, by shutting down the NFS server process. At this point, Asterisk becomes almost non-responsive. It won't even process a 'sip show peers' command correctly. It displays a few lines of text, pauses for several seconds, and then displays the rest. When a call comes into the system, Asterisk seems to do nothing for several seconds, and generally acts really sluggish. The phone gives up after several seconds, because Asterisk isn't doing anything. Why is Asterisk hung? Is it just a long wait, or are some threads in a D state (uninterruptable sleep)? Maybe one thread is hung and is holding a certain lock and thus all others are hung. On kernel 2.6, ps won't show the different threads of the process by default. Try: ps -T PID_OF_ASTERISK Are different threads in STAT (state) D or S? You can get a stack trace from at least from threads that are not in D state using gdb: gdb -p PID_OF_THREAD # in the (gdb) prompt: backtrace Though IIRC, the thread that is responsible to answer to 'sip show peers' is actually the main thread (whose PID is the same as the PID of asterisk). I have used the soft option with the NFS mount. BTW: what version of NFS? Have you verified that the soft option is indeed used? (take a look at /proc/mounts ). BTW: the fact that you use Outlook makes it much more difficult to read complex (branching) list threads in which you participate. I had to spend some 15 minutes or so just to glue sub-threads together. And I'm not sure most mailers even have that option to manually attach/detach threads. -- Tzafrir Cohen sip:[EMAIL PROTECTED] icq#16849755 iax:[EMAIL PROTECTED] +972-50-7952406 [EMAIL PROTECTED] http://www.xorcom.com ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
Douglas Garstang wrote: I don't think unison is a workable solution. It doesn't scale. The network and system load would increase exponentially as we added asterisk servers to our cluster. If you're clustering that many boxes, I'd investigate fibre channel SAN and GFS. That way, each node of the cluster just mounts the voicemail location locally. -- National Manager - Special Projects Melbourne / Sydney / Canberra / Hobart / London / 2/340 Gore StreetT: 1 300 SQUIZ (77859) Fitzroy, VIC T: 03 9486 0411 3065 F: 03 9486 0611 W: http://www.squiz.net/ . Open Source - Own it - Squiz.net ./ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
We use Unison Doug and it works just fine. It isn't perfect in theory but we've had no issues in practice. Your concerns over sacalbility are resolved by implementation - do you need it on every single Asterisk box, or maybe local to just two with routing to them and failover in the dial-plan? Unison is like two way rsync and consequently extremely efficient. SimonOn 6/17/06, Douglas Garstang [EMAIL PROTECTED] wrote: Mike,I don't think unison is a workable solution. It doesn't scale. The network and system load would increase exponentially as we added asterisk servers to our cluster.Doug.-Original Message- From: Mike Diehl [mailto:[EMAIL PROTECTED]]Sent: Fri 6/16/2006 9:40 AMTo: Asterisk Users Mailing List - Non-Commercial DiscussionCc: Subject: Re: [Asterisk-Users] Voicemail with NFSI don't know how big your voicemail system is, but have you considered usingUnison to syncronize the vm accross all your servers?I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes.If one fails,the other one should be good enough.Just a though,MikeOn Friday 16 June 2006 16:14, Brian Capouch wrote: Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem.You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed.But that's what you *always* assume, and you always--ALWAYS--do so snidely. Pococurante. B.___ --Bandwidth and Colocation provided by Easynews.com --Asterisk-Users mailing listTo UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users___--Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing listTo UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
On Fri, Jun 16, 2006 at 09:40:35AM -0600, Mike Diehl wrote: I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. The voicemail code assumes some locking semantics supported by the filesystem (sysv locks?) What happens when you sync a locked file? Isnt there a problem with samba with the very same issue? -- Tzafrir Cohen sip:[EMAIL PROTECTED] icq#16849755 iax:[EMAIL PROTECTED] +972-50-7952406 [EMAIL PROTECTED] http://www.xorcom.com ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
Pococurante! Or Pococurante? Or you're a big fat poco! Damn Brian, I had to look this word up. SYLLABICATION: po·co·cu·ran·te Pronunciation: (pōkō-koo-ran'tē, -rän'-, -kyoo-; It.pôkô-kOO-rän'te) ADJECTIVE: Indifferent; apathetic; nonchalant. NOUN: One who does not care; a careless or indifferent person. Thanks for expanding my vocabulary. I actually export my NFS share from my Voicemail server read-only. The registration servers mount the VFS share, only to get the MWI function working. I send all VM functions over the VM server so the registration servers never have to write to the VM NSF share so Asterisk doesn't care if it drops off. Digium has been working on a remote MWI over IAX, hopefully it will be completed soon and there will be no need for NFS or SAMBA to do any of this. There are 2 patches on Mantis that do just this, two different implementations and the authors report great success. Mantis issue 4236 and 4371 JR Poco-not ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
I have some experience with fibre-channel. I wouldn't be surprised if Asterisk behaved in exactly the same way if a fibre-channel volume went offline. It's also prohibitively expensive. -Original Message- From: Avi Miller [mailto:[EMAIL PROTECTED] Sent: Sat 6/17/2006 1:06 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I don't think unison is a workable solution. It doesn't scale. The network and system load would increase exponentially as we added asterisk servers to our cluster. If you're clustering that many boxes, I'd investigate fibre channel SAN and GFS. That way, each node of the cluster just mounts the voicemail location locally. -- National Manager - Special Projects Melbourne / Sydney / Canberra / Hobart / London / 2/340 Gore StreetT: 1 300 SQUIZ (77859) Fitzroy, VIC T: 03 9486 0411 3065 F: 03 9486 0611 W: http://www.squiz.net/ . Open Source - Own it - Squiz.net ./ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
Yes, we'd need it on every single box. We had a dedicated voicemail server in the first place. I decided to distribute voicemail between all boxes because the script that I had that copied the phone registrations over to the voicemail server (for mwi) was unreliable. -Original Message- From: Simon Woodhead [mailto:[EMAIL PROTECTED] Sent: Sat 6/17/2006 1:31 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: Re: [Asterisk-Users] Voicemail with NFS We use Unison Doug and it works just fine. It isn't perfect in theory but we've had no issues in practice. Your concerns over sacalbility are resolved by implementation - do you need it on every single Asterisk box, or maybe local to just two with routing to them and failover in the dial-plan? Unison is like two way rsync and consequently extremely efficient. Simon On 6/17/06, Douglas Garstang [EMAIL PROTECTED] wrote: Mike, I don't think unison is a workable solution. It doesn't scale. The network and system load would increase exponentially as we added asterisk servers to our cluster. Doug. -Original Message- From: Mike Diehl [mailto:[EMAIL PROTECTED] Sent: Fri 6/16/2006 9:40 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: Re: [Asterisk-Users] Voicemail with NFS I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. Just a though, Mike On Friday 16 June 2006 16:14, Brian Capouch wrote: Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem. You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed. But that's what you *always* assume, and you always--ALWAYS--do so snidely
RE: [Asterisk-Users] Voicemail with NFS
JR, Are you sure that a ro mounted volume won't behave in the same fashion as a rw mounted one when the NFS server is abruptly shut down? Have you tried shutting down the NFS server? Does Asterisk recover from this? Doug. -Original Message- From: JR Richardson [mailto:[EMAIL PROTECTED] Sent: Sat 6/17/2006 8:04 AM To: asterisk-users@lists.digium.com Cc: Subject: Re: [Asterisk-Users] Voicemail with NFS Pococurante! Or Pococurante? Or you're a big fat poco! Damn Brian, I had to look this word up. SYLLABICATION: po·co·cu·ran·te Pronunciation: (pōkō-koo-ran'tē, -rän'-, -kyoo-; It.pôkô-kOO-rän'te) ADJECTIVE: Indifferent; apathetic; nonchalant. NOUN: One who does not care; a careless or indifferent person. Thanks for expanding my vocabulary. I actually export my NFS share from my Voicemail server read-only. The registration servers mount the VFS share, only to get the MWI function working. I send all VM functions over the VM server so the registration servers never have to write to the VM NSF share so Asterisk doesn't care if it drops off. Digium has been working on a remote MWI over IAX, hopefully it will be completed soon and there will be no need for NFS or SAMBA to do any of this. There are 2 patches on Mantis that do just this, two different implementations and the authors report great success. Mantis issue 4236 and 4371 JR Poco-not ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
JR Richardson wrote: Pococurante! Or Pococurante? Or you're a big fat poco! Damn Brian, I had to look this word up. SYLLABICATION: po·co·cu·ran·te Pronunciation: (pōkō-koo-ran'tē, -rän'-, -kyoo-; It.pôkô-kOO-rän'te) ADJECTIVE: Indifferent; apathetic; nonchalant. NOUN: One who does not care; a careless or indifferent person. Thanks for expanding my vocabulary. Actually, the Pococurante I was referring to was a minor character from one of the Enlightenment's most famous novels. Voltaire chose Pococurante as the name of a character in his famous novel Candide. http://www.pinkmonkey.com/booknotes/monkeynotes/pmCandide33.asp Everything Lord Pococurante encounters is beneath him. Despite being surrounded by the trappings of luxury and high culture, he complains that none of it is of any real value, or interest, to him. He is too good for the world. B. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
Are you sure that a ro mounted volume won't behave in the same fashion as a rw mounted one when the NFS server is abruptly shut down? Have you tried shutting down the NFS server? Does Asterisk recover from this? Doug, I have to say, my system has been working fine, but could not recall if I actually tested a VM server crash, so I did a test and even with ro mounted asterisk did not like that either. I'm in the middle of some more testing, so far things are a miss. I do hate breaking things just to counter the what if's but it is better to be prepared than asleep at the wheel. JR JR Richardson Engineering for the Masses ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] Voicemail with NFS (working, I think)
I'm using a stand-alone VM server and exporting the VM files ro for MWI function only. All my registration servers mount the remote NFS share just to check MWI, all read-write functions to the VM files occur on the VM server only. On the registration servers, I mounted the remote VM share with this in my fstab.conf: 10.10.14.124:/var/spool/asterisk/voicemail /mnt/vmserver nfs soft,nolock,timeo=1,retrans=1,bg,intr all on one line of course [10.10.14.124:/var/spool/asterisk/voicemail] is the voicemail server and [/mn/vmserver] is the mounted location, [nfs] is the file system type, options: (the important stuff) [soft] If an NFS file operation has a major timeout, then report an I/O error to the calling program. The default is to continue retrying NFS file operations indefinitely. [nolock] does not use locking. [timeo=1] redces the nfs share minor timeouts to 1 tenth of a second [retrans=1] reduces the number of minor timeouts and retransmitts needed to cause a major timeout. [bg] background the re-mount operation [intr] interupt the nfs file operation for the calling program when a major timeout occurs When mounting the nfs without these options, Asterisk became immediately unstable when the remote nfs dropped off-line, but also regained is operation immediately when the nfs became available again. When mouting the nfs with these options, asterisk kept on ticking without interruption, WMI was unavailable of course, but all other functions worked. The MWI came back on immediately after the nfs share was restored. Of course this is a hack and I'm patiently waiting for Digium to implement the Remote MWI over IAX and incorporate into stable releases. Hope this helps. JR -- JR Richardson Engineering for the Masses ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
At 03:44 PM 6/16/2006, you wrote: The hanging waiting for NFS volume to become avaiable is a classic NFS situation, hardly limited to your little experiment. Silly question, but how is this different than a hard disk in the local machine crashing or the router dying or even pulling the plug on the * box itself? Would you expect it to handle any of those scenarios? Ira ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
Other applications can handle it. Don't see why Asterisk can't. Mount the nfs volume with the -soft option. Do a 'df -k' and you will see that the df command will time out in a couple of seconds. Why can't Asterisk do the same? -Original Message- From: Ira [mailto:[EMAIL PROTECTED] Sent: Sat 6/17/2006 3:10 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: RE: [Asterisk-Users] Voicemail with NFS At 03:44 PM 6/16/2006, you wrote: The hanging waiting for NFS volume to become avaiable is a classic NFS situation, hardly limited to your little experiment. Silly question, but how is this different than a hard disk in the local machine crashing or the router dying or even pulling the plug on the * box itself? Would you expect it to handle any of those scenarios? Ira ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
On Sat, 17 Jun 2006, Douglas Garstang wrote: Other applications can handle it. Don't see why Asterisk can't. Mount the nfs volume with the -soft option. Do a 'df -k' and you will see that the df command will time out in a couple of seconds. Why can't Asterisk do the same? Just gonna throw gas on the fire. df -h doesn't continuously poll the drive for data, asterisk is (for mwi). So each timeout turns into another timeout. Didn't you already test changing the time on checkmwi? And did it not change the behavior (not necessarily for the better)? -- Aaron Daniel Computer Systems Technician Sam Houston State University [EMAIL PROTECTED] (936) 294-4198 ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] Voicemail with NFS
I have /var/spool/asterisk/voicemail NFS mounted from another server. Everything is fine, until I simulate an NFS server failure, by shutting down the NFS server process. At this point, Asterisk becomes almost non-responsive. It won't even process a 'sip show peers' command correctly. It displays a few lines of text, pauses for several seconds, and then displays the rest. When a call comes into the system, Asterisk seems to do nothing for several seconds, and generally acts really sluggish. The phone gives up after several seconds, because Asterisk isn't doing anything. I have used the soft option with the NFS mount. I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. We just changed our model from a single, central voicemail server, to a distributed model, to get around some issues. We can't lose ALL pbx functionality just because the voicemail NFS server goes away. That's insane. Doug. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
you might want to try autofs to drive the nfs functions. it'll make you less susceptable as the filesystem won't be mounted full time Douglas Garstang wrote: I have /var/spool/asterisk/voicemail NFS mounted from another server. Everything is fine, until I simulate an NFS server failure, by shutting down the NFS server process. At this point, Asterisk becomes almost non-responsive. It won't even process a 'sip show peers' command correctly. It displays a few lines of text, pauses for several seconds, and then displays the rest. When a call comes into the system, Asterisk seems to do nothing for several seconds, and generally acts really sluggish. The phone gives up after several seconds, because Asterisk isn't doing anything. I have used the soft option with the NFS mount. I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. We just changed our model from a single, central voicemail server, to a distributed model, to get around some issues. We can't lose ALL pbx functionality just because the voicemail NFS server goes away. That's insane. Doug. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- One day at a time, one second if that's what it takes ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
I'll give this a try, but what happens when someone tries to access their voicemail? Common sense would say that THEN the system will fall apart, which isn't much of a solution. Doug. -Original Message- From: Bruce Ferrell [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 2:26 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS you might want to try autofs to drive the nfs functions. it'll make you less susceptable as the filesystem won't be mounted full time Douglas Garstang wrote: I have /var/spool/asterisk/voicemail NFS mounted from another server. Everything is fine, until I simulate an NFS server failure, by shutting down the NFS server process. At this point, Asterisk becomes almost non-responsive. It won't even process a 'sip show peers' command correctly. It displays a few lines of text, pauses for several seconds, and then displays the rest. When a call comes into the system, Asterisk seems to do nothing for several seconds, and generally acts really sluggish. The phone gives up after several seconds, because Asterisk isn't doing anything. I have used the soft option with the NFS mount. I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. We just changed our model from a single, central voicemail server, to a distributed model, to get around some issues. We can't lose ALL pbx functionality just because the voicemail NFS server goes away. That's insane. Doug. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- One day at a time, one second if that's what it takes ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
Douglas Garstang wrote: I'll give this a try, but what happens when someone tries to access their voicemail? Common sense would say that THEN the system will fall apart, which isn't much of a solution. What do you want it to do? The hanging waiting for NFS volume to become avaiable is a classic NFS situation, hardly limited to your little experiment. There are NFS mount options that stop the hang, but they won't correct the fact that your voicemail store isn't there. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. You never give up on dissing Asterisk, do you, Pococurante? B. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
-Original Message- From: Brian Capouch [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 3:30 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I'll give this a try, but what happens when someone tries to access their voicemail? Common sense would say that THEN the system will fall apart, which isn't much of a solution. What do you want it to do? The hanging waiting for NFS volume to become avaiable is a classic NFS situation, hardly limited to your little experiment. There are NFS mount options that stop the hang, but they won't correct the fact that your voicemail store isn't there. What do I want what to do? I don't see why Asterisk should hang. As I said, I mounted the NFS share with the 'soft' option and a timeout of 5 seconds. When I do a 'df -k' command, the result hangs for 5s or so and then returns. Asterisk doesn't seem to behave in the same way. Considering it's a function of the mount command, you'd think it would be transparent to Asterisk. Yes... soft causes it not to hang for everything else except Asterisk I don't care if the voicemail store goes away. I do care if the voicemail store going away causes all calls across the entire system to fail. Doug. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
-Original Message- From: Brian Capouch [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 3:40 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
I'm curious is this might help: this is in sip.conf ;checkmwi=10; Default time between mailbox checks for peers This might be the reason asterisk misbehaves when the NFS mount is unavailable. Therfore I think this might tell asterisk not to try looking thru the folders every 10 seconds and will therefore allow asterisk to allow for a missing NFS mount for longer than 10 seconds. However if someone wants to leave a message, I'm not sure this will work. On 6/16/06, Douglas Garstang [EMAIL PROTECTED] wrote: -Original Message- From: Brian Capouch [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 3:40 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
CF... I tried setting it to 60s, and it delays the same final result. The system becomes unresponsive, but it just takes a few more seconds to do it. Looks like it's somehow related to Asterisk polling it's voicemail store every checkmwi seconds. Well... :( -Original Message- From: C F [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 4:06 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS I'm curious is this might help: this is in sip.conf ;checkmwi=10; Default time between mailbox checks for peers This might be the reason asterisk misbehaves when the NFS mount is unavailable. Therfore I think this might tell asterisk not to try looking thru the folders every 10 seconds and will therefore allow asterisk to allow for a missing NFS mount for longer than 10 seconds. However if someone wants to leave a message, I'm not sure this will work. On 6/16/06, Douglas Garstang [EMAIL PROTECTED] wrote: -Original Message- From: Brian Capouch [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 3:40 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem. You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed. But that's what you *always* assume, and you always--ALWAYS--do so snidely. Pococurante. B. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
On 16:14, Fri 16 Jun 06, Douglas Garstang wrote: CF... I tried setting it to 60s, and it delays the same final result. The system becomes unresponsive, but it just takes a few more seconds to do it. Looks like it's somehow related to Asterisk polling it's voicemail store every checkmwi seconds. Well... :( Did you try setting it to 0 ? I havent checked the source to see if this disables it, but I guess it's worth a try :) -- Michiel van Baak [EMAIL PROTECTED] http://michiel.vanbaak.eu GnuPG key: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x71C946BD Why is it drug addicts and computer afficionados are both called users? ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
-Original Message- From: Brian Capouch [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 3:30 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS Douglas Garstang wrote: I'll give this a try, but what happens when someone tries to access their voicemail? Common sense would say that THEN the system will fall apart, which isn't much of a solution. What do you want it to do? The hanging waiting for NFS volume to become avaiable is a classic NFS situation, hardly limited to your little experiment. There are NFS mount options that stop the hang, but they won't correct the fact that your voicemail store isn't there. We've just tried the same thing, but with a samba server. Shut down the samba server, and Asterisk stops processing calls. Actually, this time the phones will fail over to the next asterisk box. However, if all asterisk boxes are pointing to the same samba server, then failover from one asterisk box to another isn't going to help at all. So... Asterisk responds to a samba failure in the same way as an NFS failure. Looks like it's time to start playing with rsync... ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. Just a though, Mike On Friday 16 June 2006 16:14, Brian Capouch wrote: Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem. You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed. But that's what you *always* assume, and you always--ALWAYS--do so snidely. Pococurante. B. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
Mike, Never heard of Unison... do you have a link to it? Doug. -Original Message- From: Mike Diehl [mailto:[EMAIL PROTECTED] Sent: Friday, June 16, 2006 9:41 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Voicemail with NFS I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. Just a though, Mike On Friday 16 June 2006 16:14, Brian Capouch wrote: Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem. You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed. But that's what you *always* assume, and you always--ALWAYS--do so snidely. Pococurante. B. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
- Original Message - From: Douglas Garstang [EMAIL PROTECTED] To: Asterisk Users Mailing List - Non-Commercial Discussion asterisk-users@lists.digium.com Sent: Friday, June 16, 2006 3:49 PM Subject: RE: [Asterisk-Users] Voicemail with NFS Mike, Never heard of Unison... do you have a link to it? Doug. I'm another Mike but we all answer when called. ;-) Here is the link: http://www.cis.upenn.edu/%7Ebcpierce/unison/ It's like rsync on sterioids. Hope this helps, Mike Mc. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Voicemail with NFS
Mike, I don't think unison is a workable solution. It doesn't scale. The network and system load would increase exponentially as we added asterisk servers to our cluster. Doug. -Original Message- From: Mike Diehl [mailto:[EMAIL PROTECTED] Sent: Fri 6/16/2006 9:40 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: Re: [Asterisk-Users] Voicemail with NFS I don't know how big your voicemail system is, but have you considered using Unison to syncronize the vm accross all your servers? I'm deploying multiple servers with two vm servers, each sync'ed every 5? minutes. If one fails, the other one should be good enough. Just a though, Mike On Friday 16 June 2006 16:14, Brian Capouch wrote: Douglas Garstang wrote: Douglas Garstang wrote: I hope someone isn't going to tell me that the voicemail directory going away is going to cause Asterisk to fall in a heap on the floor. Brian Capouch wrote: You never give up on dissing Asterisk, do you, Pococurante? This would be acceptable behaviour for you? An NFS-mounted volume isn't ever going to be as reliable as one mounted on the local filesystem. You are introducing additional points of failure both with respect to there now being two hard drives involved, as well as an interposed network that can fail in a variety of ways. So by definition this arrangement isn't going to be as reliable as one based on a native filesystem. And you never have answered the direct question: what do you expect the logical thing would be to happen if all the sudden an important system resource has just gone away? Regardless of the answer (because a rejoinder to that would then be, So add that behavior into Asterisk, or help the developers do so . . ) my point isn't that you are finding--actually looking for--places where catastrophic behavior makes Asterisk suffer. The problem is that you don't ever say, So what are some reasonable things that might be done in this situation; instead you emit a scathing remark (fall in a heap on the floor) that would indicate you've discovered some glaring design flaw that any idiot would have known to design around ahead of your finding it. It is not automatically the case that if Asterisk doesn't do something you think it should do it means that Asterisk is horribly and glaringly flawed. But that's what you *always* assume, and you always--ALWAYS--do so snidely. Pococurante. B. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Voicemail with NFS
How about DRBD ? http://www.slackworks.com/~dkrovich/DRBD/introduction.html#AEN14 This is mirroring a whole block device via (a dedicated) network. You could see it as a network raid. Julian. Mike McMullen wrote: - Original Message - From: Douglas Garstang [EMAIL PROTECTED] To: Asterisk Users Mailing List - Non-Commercial Discussion asterisk-users@lists.digium.com Sent: Friday, June 16, 2006 3:49 PM Subject: RE: [Asterisk-Users] Voicemail with NFS Mike, Never heard of Unison... do you have a link to it? Doug. I'm another Mike but we all answer when called. ;-) Here is the link: http://www.cis.upenn.edu/%7Ebcpierce/unison/ It's like rsync on sterioids. Hope this helps, Mike Mc. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
