Re: Strange Server Behavior
Some more pieces to the puzzle... I ran the same ping test last night (laptop to server), but stopped the following services on the server: apache2 exim4 mediatomb mysql nfs-kernel-server nfs-common openvpnas cups ntp rpcbind And there were no packets lost! 2802 packets transmitted, 2802 received, 0% packet loss, time 28010243ms rtt min/avg/max/mdev = 0.063/0.157/0.319/0.033 ms This is all that was running: USER PID %CPU %MEMVSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 2036 736 ?Ss Jun25 0:01 init [2] root 2 0.0 0.0 0 0 ?SJun25 0:00 [kthreadd] root 3 0.0 0.0 0 0 ?SJun25 0:00 [migration/0] root 4 0.0 0.0 0 0 ?SJun25 0:00 [ksoftirqd/0] root 5 0.0 0.0 0 0 ?SJun25 0:00 [watchdog/0] root 6 0.0 0.0 0 0 ?SJun25 0:00 [events/0] root 7 0.0 0.0 0 0 ?SJun25 0:00 [cpuset] root 8 0.0 0.0 0 0 ?SJun25 0:00 [khelper] root 9 0.0 0.0 0 0 ?SJun25 0:00 [netns] root10 0.0 0.0 0 0 ?SJun25 0:00 [async/mgr] root11 0.0 0.0 0 0 ?SJun25 0:00 [pm] root12 0.0 0.0 0 0 ?SJun25 0:00 [sync_supers] root13 0.0 0.0 0 0 ?SJun25 0:00 [bdi-default] root14 0.0 0.0 0 0 ?SJun25 0:00 [kintegrityd/0] root15 0.0 0.0 0 0 ?SJun25 0:00 [kblockd/0] root16 0.0 0.0 0 0 ?SJun25 0:00 [kacpid] root17 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_notify] root18 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_hotplug] root19 0.0 0.0 0 0 ?SJun25 0:00 [kseriod] root21 0.0 0.0 0 0 ?SJun25 0:00 [kondemand/0] root22 0.0 0.0 0 0 ?SJun25 0:00 [khungtaskd] root23 0.0 0.0 0 0 ?SJun25 0:00 [kswapd0] root24 0.0 0.0 0 0 ?SN Jun25 0:00 [ksmd] root25 0.0 0.0 0 0 ?SJun25 0:00 [aio/0] root26 0.0 0.0 0 0 ?SJun25 0:00 [crypto/0] root 154 0.0 0.0 0 0 ?SJun25 0:00 [ksuspend_usbd] root 155 0.0 0.0 0 0 ?SJun25 0:00 [khubd] root 157 0.0 0.0 0 0 ?SJun25 0:00 [ata/0] So, perhaps I don't have a hardware problem, but a software problem? Mark On Tue, Jun 26, 2012 at 9:02 PM, Stephen cryptwo...@gmail.com wrote: What about pings from the server? Also my paranoia about this would have me checking the arp tables to see if the ip address is getting mis-somethinged. Also see if uou can make a task that will wrife to a file once every qp sex and see if the server is falling asleep or if it is network related. It may be nic or switch for example. On Jun 26, 2012 7:42 PM, Mark Phillips m...@phillipsmarketing.biz wrote: My ping test is not what I expected but still shows a problem. I setup the test to ping (64 bytes, ttl =64) the problem server every 10 seconds from my laptop. Both are plugged in, on the same subnet. The boxes are about 5 feet apart. Here are the results: 3434 packets transmitted, 3307 received, 3% packet loss, time 34336321ms rtt min/avg/max/mdev = 0.100/0.231/4.332/0.275 ms I found 38 instances where the time stamps for the pings hiccuped and there was a delay. Each hiccup lasted (min/avg/max) 10/44/70 seconds. The time between hiccups was (min/avg/max) 1:20/14:29/29:00 minutes. I grep'd the log files for messages around these 38 incidents, but did not find any messages in any of the logs. However this is not a good test, so I just trolled the logs and didn't find anything significant. Do these numbers strike a chord with anyone? I will check the caps on the MB later this week. I looked in syslog, and could not find any correlation with the 38 hiccups. However, what do these two cron jobs do, since the run quite frequently: CMD ( cd / run-parts --report /etc/cron.hourly) CMD ( [ -x /usr/lib/php5/maxlifetime ] [ -d /var/lib/php5 ] find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -delete) A search through the log files for error does not return anything interesting. Since apache and few other apps were running on the server, I will run the ping test again tonight after I kill everything on the server. Thanks! Mark On Tue, Jun 26, 2012 at 9:35 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Curious how your test turned out. ** ** You may also want to run an iostat to a file and see if that correlates to the slow responses. ** ** However, that ‘bulging capacitor’ thing others have
Re: Strange Server Behavior
Stephen, Great ideas...more tests for the morning! Mark On Jun 26, 2012 9:02 PM, Stephen cryptwo...@gmail.com wrote: What about pings from the server? Also my paranoia about this would have me checking the arp tables to see if the ip address is getting mis-somethinged. Also see if uou can make a task that will wrife to a file once every qp sex and see if the server is falling asleep or if it is network related. It may be nic or switch for example. On Jun 26, 2012 7:42 PM, Mark Phillips m...@phillipsmarketing.biz wrote: My ping test is not what I expected but still shows a problem. I setup the test to ping (64 bytes, ttl =64) the problem server every 10 seconds from my laptop. Both are plugged in, on the same subnet. The boxes are about 5 feet apart. Here are the results: 3434 packets transmitted, 3307 received, 3% packet loss, time 34336321ms rtt min/avg/max/mdev = 0.100/0.231/4.332/0.275 ms I found 38 instances where the time stamps for the pings hiccuped and there was a delay. Each hiccup lasted (min/avg/max) 10/44/70 seconds. The time between hiccups was (min/avg/max) 1:20/14:29/29:00 minutes. I grep'd the log files for messages around these 38 incidents, but did not find any messages in any of the logs. However this is not a good test, so I just trolled the logs and didn't find anything significant. Do these numbers strike a chord with anyone? I will check the caps on the MB later this week. I looked in syslog, and could not find any correlation with the 38 hiccups. However, what do these two cron jobs do, since the run quite frequently: CMD ( cd / run-parts --report /etc/cron.hourly) CMD ( [ -x /usr/lib/php5/maxlifetime ] [ -d /var/lib/php5 ] find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -delete) A search through the log files for error does not return anything interesting. Since apache and few other apps were running on the server, I will run the ping test again tonight after I kill everything on the server. Thanks! Mark On Tue, Jun 26, 2012 at 9:35 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Curious how your test turned out. ** ** You may also want to run an iostat to a file and see if that correlates to the slow responses. ** ** However, that ‘bulging capacitor’ thing others have mentioned sounds like a pretty convincing coincidence, as it were…. ** ** (I will say that USUALLY I’d agree with JD – Iobound or low RAM (and thus iobound on swap space) are the only things I’ve seen that cause unresponsiveness (never seen an overheat slow it down, usually it just dies suddenly. I probably get fast overheating and not slow increases in heat levels J) ** ** OH! WAIT! I just remembered another event – and it WON’T show up in normal performance logs. If ‘you’ send a command to a disk drive, and it goes busy for a long time, your system can become totally locked until the timeout happens and the kernel gives up. (If that happens, there SHOULD be a timeout recorded in the syslog or /var/log/messages. Check there for timeouts on disk drives or hard resets or such). (I know this because of where I work J) (Disk drives are supposed to acknowledge the command almost immediately. It is almost always a bad thing when the drive takes the command but does not finish the initial command handshake sequence… You might want to look at the S.M.A.R.T. attributes for your drives as well to see if any of them are showing ‘pre-fail’ conditions) ** ** Rusty ** ** *From:* plug-discuss-boun...@lists.plug.phoenix.az.us [mailto: plug-discuss-boun...@lists.plug.phoenix.az.us] *On Behalf Of *Mark Phillips *Sent:* Monday, June 25, 2012 10:13 PM *To:* Main PLUG discussion list *Subject:* Re: Strange Server Behavior ** ** Right now, the server is not doing anything but sitting there Tasks: 98 total, 1 running, 97 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1033780k total, 217560k used, 816220k free, 6220k buffers Swap: 2019320k total,0k used, 2019320k free,94056k cached Plenty of swap, not very busy. It may be over heating, but not sure why. I am going to run a test tonight - ping every 10 seconds and time stamp the output into a file. Perhaps I will see gaps or unusually long response times and I can correlate that with the log files. Mark On Mon, Jun 25, 2012 at 10:09 PM, JD Austin j...@twingeckos.com wrote: I've had servers that act like that.. usually they're over heating, completely I/O bound, or swapping due to low available memory. ** ** On Mon, Jun 25, 2012 at 10:00 PM, Mark Phillips m...@phillipsmarketing.biz wrote: Nope - everything just stops - ping waits for a response, web services just wait for the server, file transfers stop and wait...as if time just stopped for the server, then starts
RE: Strange Server Behavior
Personal guesses, YMMV, YKWYPFI (you know what you paid for it), etc: If you don't need NFS, leave it off. When I saw it in there I thought - oh, my. For NFS clients, I know you can freeze a system when the server goes unresponsive. Or I think I know that J Of all those things, are there any you are NOT using? Besides the ping test mentioned earlier, I suppose you could start dividing and conquering (turn back on half the items below, run the test. If passes, run the other half to verify that the mix of the other half will fail, THEN split the failing half in half and repeat). I can't recall if I've ever seen a hung printer hang cups enough to hang the entire system. It will hang printing, of course, but... In any case, yes it sounds like some sort of hw/sw interaction or maybe just sw. Good luck, Mr Phelps! ;-) Rusty From: plug-discuss-boun...@lists.plug.phoenix.az.us [mailto:plug-discuss-boun...@lists.plug.phoenix.az.us] On Behalf Of Mark Phillips Sent: Wednesday, June 27, 2012 6:51 AM To: Main PLUG discussion list Subject: Re: Strange Server Behavior Some more pieces to the puzzle... I ran the same ping test last night (laptop to server), but stopped the following services on the server: apache2 exim4 mediatomb mysql nfs-kernel-server nfs-common openvpnas cups ntp rpcbind And there were no packets lost! 2802 packets transmitted, 2802 received, 0% packet loss, time 28010243ms rtt min/avg/max/mdev = 0.063/0.157/0.319/0.033 ms This is all that was running: USER PID %CPU %MEMVSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 2036 736 ?Ss Jun25 0:01 init [2] root 2 0.0 0.0 0 0 ?SJun25 0:00 [kthreadd] root 3 0.0 0.0 0 0 ?SJun25 0:00 [migration/0] root 4 0.0 0.0 0 0 ?SJun25 0:00 [ksoftirqd/0] root 5 0.0 0.0 0 0 ?SJun25 0:00 [watchdog/0] root 6 0.0 0.0 0 0 ?SJun25 0:00 [events/0] root 7 0.0 0.0 0 0 ?SJun25 0:00 [cpuset] root 8 0.0 0.0 0 0 ?SJun25 0:00 [khelper] root 9 0.0 0.0 0 0 ?SJun25 0:00 [netns] root10 0.0 0.0 0 0 ?SJun25 0:00 [async/mgr] root11 0.0 0.0 0 0 ?SJun25 0:00 [pm] root12 0.0 0.0 0 0 ?SJun25 0:00 [sync_supers] root13 0.0 0.0 0 0 ?SJun25 0:00 [bdi-default] root14 0.0 0.0 0 0 ?SJun25 0:00 [kintegrityd/0] root15 0.0 0.0 0 0 ?SJun25 0:00 [kblockd/0] root16 0.0 0.0 0 0 ?SJun25 0:00 [kacpid] root17 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_notify] root18 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_hotplug] root19 0.0 0.0 0 0 ?SJun25 0:00 [kseriod] root21 0.0 0.0 0 0 ?SJun25 0:00 [kondemand/0] root22 0.0 0.0 0 0 ?SJun25 0:00 [khungtaskd] root23 0.0 0.0 0 0 ?SJun25 0:00 [kswapd0] root24 0.0 0.0 0 0 ?SN Jun25 0:00 [ksmd] root25 0.0 0.0 0 0 ?SJun25 0:00 [aio/0] root26 0.0 0.0 0 0 ?SJun25 0:00 [crypto/0] root 154 0.0 0.0 0 0 ?SJun25 0:00 [ksuspend_usbd] root 155 0.0 0.0 0 0 ?SJun25 0:00 [khubd] root 157 0.0 0.0 0 0 ?SJun25 0:00 [ata/0] So, perhaps I don't have a hardware problem, but a software problem? Mark --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: Strange Server Behavior
I only installed nfs because I started to use this server as a media server, and I wanted my family to be able to add movies to the movie folder on the server. Mediatomb then scans the folder and makes the movies available on our nifty wifi enabled TV. Would samba be a better choice? The other computers on the network are mac, windows, ubuntu. However, the windoes user has a low probability of adding any movies by herself;) (no gender bashing here.I live with four wonderful women, and one of them is a complete techo-phobe, and she is proud of it.but that helps keep me around, so all is good with the world). Mark On Wed, Jun 27, 2012 at 8:20 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Personal guesses, YMMV, YKWYPFI (you know what you paid for it), etc: ** ** If you don’t need NFS, leave it off. When I saw it in there I thought – oh, my. For NFS clients, I know you can freeze a system when the server goes unresponsive. Or I think I know that J ** ** Of all those things, are there any you are NOT using? ** ** Besides the ping test mentioned earlier, I suppose you could start dividing and conquering (turn back on half the items below, run the test. If passes, run the other half to verify that the mix of the other half will fail, THEN split the failing half in half and repeat). ** ** I can’t recall if I’ve ever seen a hung printer hang cups enough to hang the entire system. It will hang printing, of course, but… ** ** In any case, yes it sounds like some sort of hw/sw interaction or maybe just sw. ** ** Good luck, Mr Phelps! ;-) ** ** Rusty ** ** *From:* plug-discuss-boun...@lists.plug.phoenix.az.us [mailto: plug-discuss-boun...@lists.plug.phoenix.az.us] *On Behalf Of *Mark Phillips *Sent:* Wednesday, June 27, 2012 6:51 AM *To:* Main PLUG discussion list *Subject:* Re: Strange Server Behavior ** ** Some more pieces to the puzzle... I ran the same ping test last night (laptop to server), but stopped the following services on the server: apache2 exim4 mediatomb mysql nfs-kernel-server nfs-common openvpnas cups ntp rpcbind And there were no packets lost! 2802 packets transmitted, 2802 received, 0% packet loss, time 28010243ms rtt min/avg/max/mdev = 0.063/0.157/0.319/0.033 ms This is all that was running: USER PID %CPU %MEMVSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 2036 736 ?Ss Jun25 0:01 init [2] root 2 0.0 0.0 0 0 ?SJun25 0:00 [kthreadd] root 3 0.0 0.0 0 0 ?SJun25 0:00 [migration/0] root 4 0.0 0.0 0 0 ?SJun25 0:00 [ksoftirqd/0] root 5 0.0 0.0 0 0 ?SJun25 0:00 [watchdog/0] root 6 0.0 0.0 0 0 ?SJun25 0:00 [events/0] root 7 0.0 0.0 0 0 ?SJun25 0:00 [cpuset] root 8 0.0 0.0 0 0 ?SJun25 0:00 [khelper] root 9 0.0 0.0 0 0 ?SJun25 0:00 [netns] root10 0.0 0.0 0 0 ?SJun25 0:00 [async/mgr] root11 0.0 0.0 0 0 ?SJun25 0:00 [pm] root12 0.0 0.0 0 0 ?SJun25 0:00 [sync_supers] root13 0.0 0.0 0 0 ?SJun25 0:00 [bdi-default] root14 0.0 0.0 0 0 ?SJun25 0:00 [kintegrityd/0] root15 0.0 0.0 0 0 ?SJun25 0:00 [kblockd/0] root16 0.0 0.0 0 0 ?SJun25 0:00 [kacpid] root17 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_notify] root18 0.0 0.0 0 0 ?SJun25 0:00 [kacpi_hotplug] root19 0.0 0.0 0 0 ?SJun25 0:00 [kseriod] root21 0.0 0.0 0 0 ?SJun25 0:00 [kondemand/0] root22 0.0 0.0 0 0 ?SJun25 0:00 [khungtaskd] root23 0.0 0.0 0 0 ?SJun25 0:00 [kswapd0] root24 0.0 0.0 0 0 ?SN Jun25 0:00 [ksmd] root25 0.0 0.0 0 0 ?SJun25 0:00 [aio/0] root26 0.0 0.0 0 0 ?SJun25 0:00 [crypto/0] root 154 0.0 0.0 0 0 ?SJun25 0:00 [ksuspend_usbd] root 155 0.0 0.0 0 0 ?SJun25 0:00 [khubd] root 157 0.0 0.0 0 0 ?SJun25 0:00 [ata/0] So, perhaps I don't have a hardware problem, but a software problem? Mark ** ** --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
RE: Strange Server Behavior
Well, NFS server is less likely (I think!) to cause momentary freezes than the client, but samba MIGHT be an idea. Hopefully someone else here has more experience with the server side of things, or maybe google would help. On the upload video thing - if you wanted to go to a lot of work, you could put directories on each computer that periodically get rsync'd (or whatever) to the server, so that the family members only need to copy the movie to the directory on their machine and it will automatically get copied across. But that may be more work and fragility than you want J (and might make you more expendable!). but that could get rid of nfs or samba or any such thing. Probably not worth doing if NFS isn't' the issue J, so I'd say turn on half the processes and see what happens, as I mentioned before.. Thinking about the system for a bit - first the schedule of when things freeze. Does it line up with anything being done on the client machines? On the TV? What 'absolute time' (wall clock time) were those 38 incidents at? (If clients do something every 30 minutes, and they are out of sync with each other, that might explain the variability of the hiccup timing) Going a bit further afield: Have you verified that nobody is using your wifi for any nefarious purposes? Just some random thoughts... Rusty From: plug-discuss-boun...@lists.plug.phoenix.az.us [mailto:plug-discuss-boun...@lists.plug.phoenix.az.us] On Behalf Of Mark Phillips Sent: Wednesday, June 27, 2012 8:47 AM To: Main PLUG discussion list Subject: Re: Strange Server Behavior I only installed nfs because I started to use this server as a media server, and I wanted my family to be able to add movies to the movie folder on the server. Mediatomb then scans the folder and makes the movies available on our nifty wifi enabled TV. Would samba be a better choice? The other computers on the network are mac, windows, ubuntu. However, the windoes user has a low probability of adding any movies by herself;) (no gender bashing here.I live with four wonderful women, and one of them is a complete techo-phobe, and she is proud of it.but that helps keep me around, so all is good with the world). Mark --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: Strange Server Behavior
Rusty, The test was run from 11 PM to 7 AM, so no one in my house was doing anything but sawing logs, as far as I know. Yes, teenagers tend to stay up late, but I would have heard the tv. I don't think any of the other machines are really doing anything at that time as well. I don't think anyone is using my wifiI have a 64 character key for AES and mac address filter for security. Yes, I know one can eaily spoof the mac address thing, but it keeps some out. I also have not seen anything strange in the logs. Rsync is a good idea, but I agree - fragile, lots to set up, but maybe worth a thought if nfs tends to be the problem. Maybe a script to check if a local folder has changed, and then rsync it Mark On Wed, Jun 27, 2012 at 8:59 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Well, NFS server is less likely (I think!) to cause momentary freezes than the client, but samba MIGHT be an idea. Hopefully someone else here has more experience with the server side of things, or maybe google would help. ** ** On the upload video thing – if you wanted to go to a lot of work, you could put directories on each computer that periodically get rsync’d (or whatever) to the server, so that the family members only need to copy the movie to the directory on their machine and it will automatically get copied across. But that may be more work and fragility than you want J (and might make you more expendable!). but that could get rid of nfs or samba or any such thing. Probably not worth doing if NFS isn’t’ the issue J, so I’d say turn on half the processes and see what happens, as I mentioned before.. ** ** Thinking about the system for a bit – first the schedule of when things freeze. Does it line up with anything being done on the client machines? On the TV? What ‘absolute time’ (wall clock time) were those 38 incidents at? (If clients do something every 30 minutes, and they are out of sync with each other, that might explain the variability of the hiccup timing)* *** ** ** Going a bit further afield: Have you verified that nobody is using your wifi for any nefarious purposes? ** ** Just some random thoughts… ** ** Rusty ** ** *From:* plug-discuss-boun...@lists.plug.phoenix.az.us [mailto: plug-discuss-boun...@lists.plug.phoenix.az.us] *On Behalf Of *Mark Phillips *Sent:* Wednesday, June 27, 2012 8:47 AM *To:* Main PLUG discussion list *Subject:* Re: Strange Server Behavior ** ** I only installed nfs because I started to use this server as a media server, and I wanted my family to be able to add movies to the movie folder on the server. Mediatomb then scans the folder and makes the movies available on our nifty wifi enabled TV. Would samba be a better choice? The other computers on the network are mac, windows, ubuntu. However, the windoes user has a low probability of adding any movies by herself;) (no gender bashing here.I live with four wonderful women, and one of them is a complete techo-phobe, and she is proud of it.but that helps keep me around, so all is good with the world). Mark ** ** --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
RE: Strange Server Behavior
Well, I had to ask J I'd say its 'divide and conquer time' like I suggested earlier - enable half (approx) of the services and run the test. If it passes, turn those off and then turn on the other half, rerun test. If it passes, life gets hard, and I'm going to ignore that possibility for now! Whichever test fails, repeat the above with that reduced set of services. If both halves pass, then there is some interaction between the services, and it's not so easy as divide and conquer. (but of course, if a service depends upon another one to be fully functional (apache and mysql are likely examples) then you'll have to keep those services together till the bitter end (as it were)). However, there is still hope someone here has another idea... Rusty From: plug-discuss-boun...@lists.plug.phoenix.az.us [mailto:plug-discuss-boun...@lists.plug.phoenix.az.us] On Behalf Of Mark Phillips Sent: Wednesday, June 27, 2012 9:12 AM To: Main PLUG discussion list Subject: Re: Strange Server Behavior Rusty, The test was run from 11 PM to 7 AM, so no one in my house was doing anything but sawing logs, as far as I know. Yes, teenagers tend to stay up late, but I would have heard the tv. I don't think any of the other machines are really doing anything at that time as well. I don't think anyone is using my wifiI have a 64 character key for AES and mac address filter for security. Yes, I know one can eaily spoof the mac address thing, but it keeps some out. I also have not seen anything strange in the logs. Rsync is a good idea, but I agree - fragile, lots to set up, but maybe worth a thought if nfs tends to be the problem. Maybe a script to check if a local folder has changed, and then rsync it Mark On Wed, Jun 27, 2012 at 8:59 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Well, NFS server is less likely (I think!) to cause momentary freezes than the client, but samba MIGHT be an idea. Hopefully someone else here has more experience with the server side of things, or maybe google would help. On the upload video thing - if you wanted to go to a lot of work, you could put directories on each computer that periodically get rsync'd (or whatever) to the server, so that the family members only need to copy the movie to the directory on their machine and it will automatically get copied across. But that may be more work and fragility than you want J (and might make you more expendable!). but that could get rid of nfs or samba or any such thing. Probably not worth doing if NFS isn't' the issue J, so I'd say turn on half the processes and see what happens, as I mentioned before.. Thinking about the system for a bit - first the schedule of when things freeze. Does it line up with anything being done on the client machines? On the TV? What 'absolute time' (wall clock time) were those 38 incidents at? (If clients do something every 30 minutes, and they are out of sync with each other, that might explain the variability of the hiccup timing) Going a bit further afield: Have you verified that nobody is using your wifi for any nefarious purposes? Just some random thoughts... Rusty From: plug-discuss-boun...@lists.plug.phoenix.az.us [mailto:plug-discuss-boun...@lists.plug.phoenix.az.us] On Behalf Of Mark Phillips Sent: Wednesday, June 27, 2012 8:47 AM To: Main PLUG discussion list Subject: Re: Strange Server Behavior I only installed nfs because I started to use this server as a media server, and I wanted my family to be able to add movies to the movie folder on the server. Mediatomb then scans the folder and makes the movies available on our nifty wifi enabled TV. Would samba be a better choice? The other computers on the network are mac, windows, ubuntu. However, the windoes user has a low probability of adding any movies by herself;) (no gender bashing here.I live with four wonderful women, and one of them is a complete techo-phobe, and she is proud of it.but that helps keep me around, so all is good with the world). Mark --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: Strange Server Behavior
Rusty, I am running another test now, with the following services running exim4 cups apache2 openvpnas cups ntp I will keep you posted. Mark On Wed, Jun 27, 2012 at 9:16 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Well, I had to ask J ** ** I’d say its ‘divide and conquer time’ like I suggested earlier – enable half (approx) of the services and run the test. If it passes, turn those off and then turn on the other half, rerun test. If it passes, life gets hard, and I’m going to ignore that possibility for now! Whichever test fails, repeat the above with that reduced set of services. ** ** If both halves pass, then there is some interaction between the services, and it’s not so easy as divide and conquer. (but of course, if a service depends upon another one to be fully functional (apache and mysql are likely examples) then you’ll have to keep those services together till the bitter end (as it were)). ** ** However, there is still hope someone here has another idea… ** ** Rusty ** ** *From:* plug-discuss-boun...@lists.plug.phoenix.az.us [mailto: plug-discuss-boun...@lists.plug.phoenix.az.us] *On Behalf Of *Mark Phillips *Sent:* Wednesday, June 27, 2012 9:12 AM *To:* Main PLUG discussion list *Subject:* Re: Strange Server Behavior ** ** Rusty, The test was run from 11 PM to 7 AM, so no one in my house was doing anything but sawing logs, as far as I know. Yes, teenagers tend to stay up late, but I would have heard the tv. I don't think any of the other machines are really doing anything at that time as well. I don't think anyone is using my wifiI have a 64 character key for AES and mac address filter for security. Yes, I know one can eaily spoof the mac address thing, but it keeps some out. I also have not seen anything strange in the logs. Rsync is a good idea, but I agree - fragile, lots to set up, but maybe worth a thought if nfs tends to be the problem. Maybe a script to check if a local folder has changed, and then rsync it Mark On Wed, Jun 27, 2012 at 8:59 AM, Carruth, Rusty rusty.carr...@smartstoragesys.com wrote: Well, NFS server is less likely (I think!) to cause momentary freezes than the client, but samba MIGHT be an idea. Hopefully someone else here has more experience with the server side of things, or maybe google would help. On the upload video thing – if you wanted to go to a lot of work, you could put directories on each computer that periodically get rsync’d (or whatever) to the server, so that the family members only need to copy the movie to the directory on their machine and it will automatically get copied across. But that may be more work and fragility than you want J (and might make you more expendable!). but that could get rid of nfs or samba or any such thing. Probably not worth doing if NFS isn’t’ the issue J, so I’d say turn on half the processes and see what happens, as I mentioned before.. Thinking about the system for a bit – first the schedule of when things freeze. Does it line up with anything being done on the client machines? On the TV? What ‘absolute time’ (wall clock time) were those 38 incidents at? (If clients do something every 30 minutes, and they are out of sync with each other, that might explain the variability of the hiccup timing)* *** Going a bit further afield: Have you verified that nobody is using your wifi for any nefarious purposes? Just some random thoughts… Rusty *From:* plug-discuss-boun...@lists.plug.phoenix.az.us [mailto: plug-discuss-boun...@lists.plug.phoenix.az.us] *On Behalf Of *Mark Phillips *Sent:* Wednesday, June 27, 2012 8:47 AM *To:* Main PLUG discussion list *Subject:* Re: Strange Server Behavior I only installed nfs because I started to use this server as a media server, and I wanted my family to be able to add movies to the movie folder on the server. Mediatomb then scans the folder and makes the movies available on our nifty wifi enabled TV. Would samba be a better choice? The other computers on the network are mac, windows, ubuntu. However, the windoes user has a low probability of adding any movies by herself;) (no gender bashing here.I live with four wonderful women, and one of them is a complete techo-phobe, and she is proud of it.but that helps keep me around, so all is good with the world). Mark --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss ** ** --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings:
Ot but not - New android accessibility enhancements
There will even be some accessibly enhancements, allowing blind users to access braille devices to connect to Android and to use special gestures to preform basic tasks. This will open up the platform for a variety of people who have not had access before to utilize some Google services through Android. The accessibility market, I think, will become a fast moving audience as us geeks get older, soldiers come back from war, and we seek out ways to simplify basic tasks on the platform. from http://rootzwiki.com/news/_/articles/announcements/recap-of-new-features-in-jelly-bean-r927 I know there are some on this list that this might have a more direct interest than others. but some very interesting work towards accessibility in 4.1 for sure. -- A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep after you hit the snooze button. Stephen --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: rsync syntax question
rsync -avH --progress dirname/ webhostname:www/differentdirname add the trailing / and it works on the contents - see the section on Usage: http://www.samba.org/ftp/rsync/rsync.html On Wed, Jun 27, 2012 at 3:36 PM, j...@actionline.com wrote: How can I modify the following syntax to copy a directory to a different directory name? I currently use this: rsync -avH --progress dirname webhostname:www/ Which works fine to update the contents of dirname. But how could I modify this syntax so that it would copy the contents of dirname to differentdirname ? --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: rsync syntax question
what Ed said... :-) On Wed, Jun 27, 2012 at 3:45 PM, Ed p...@0x1b.com wrote: rsync -avH --progress dirname/ webhostname:www/differentdirname add the trailing / and it works on the contents - see the section on Usage: http://www.samba.org/ftp/rsync/rsync.html On Wed, Jun 27, 2012 at 3:36 PM, j...@actionline.com wrote: How can I modify the following syntax to copy a directory to a different directory name? I currently use this: rsync -avH --progress dirname webhostname:www/ Which works fine to update the contents of dirname. But how could I modify this syntax so that it would copy the contents of dirname to differentdirname ? --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss -- A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep after you hit the snooze button. Stephen --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Call for Presenters - PLUGdev July 5th
Hi All We need a presentation for the July PLUGdev meeting, Thursday the 5th. If you want to present a development oriented presentation, Please post to the PLUGdev list plugde...@lists.plug.phoenix.az.us We are looking for presentations on all aspects of development; from idea generation to details of compilation for specific languages to deployment with services and all the way to lifecycle management. If you need suggestions there is an interest in presentations that speak to the following topics: LDAP integration LINUX kernel configure and compile MySQL set up Scala Developing for RaspberryPi/Arduino/BeagleBoard/Android... Thanks and see you next Thursday - Ed --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: Call for Presenters - PLUGdev July 5th
or is the 5th too close to The Independence Day Holiday for everyone? On Wed, Jun 27, 2012 at 4:32 PM, Ed p...@0x1b.com wrote: Hi All We need a presentation for the July PLUGdev meeting, Thursday the 5th. If you want to present a development oriented presentation, Please post to the PLUGdev list plugde...@lists.plug.phoenix.az.us We are looking for presentations on all aspects of development; from idea generation to details of compilation for specific languages to deployment with services and all the way to lifecycle management. If you need suggestions there is an interest in presentations that speak to the following topics: LDAP integration LINUX kernel configure and compile MySQL set up Scala Developing for RaspberryPi/Arduino/BeagleBoard/Android... Thanks and see you next Thursday - Ed --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
Re: rsync syntax question - Thanks!
Thanks Ed. That worked perfectly. rsync -avH --progress dirname/ webhostname:www/differentdirname add the trailing / and it works on the contents - see the section on Usage: http://www.samba.org/ftp/rsync/rsync.html On Wed, Jun 27, 2012 at 3:36 PM, j...@actionline.com wrote: How can I modify the following syntax to copy a directory to a different directory name? I currently use this: rsync -avH --progress dirname webhostname:www/ Which works fine to update the contents of dirname. But how could I modify this syntax so that it would copy the contents of dirname to differentdirname ? --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
