[rt-users] RT and mySQL cluster?
Hello all, Has anyone some experience running RT on top of MySQL Cluster? Feasible? Overkill? Any issues? We think that with our application we will see peaks/burts of tickets submissions. We want to be able to absorb these peaks safely. Cheers, Thierry
Re: [rt-users] RT and mySQL cluster?
On Fri, Nov 19, 2010 at 10:03:53AM -0700, Thierry Thelliez wrote: Hello all, Has anyone some experience running RT on top of MySQL Cluster? Do you have experience with MySQL Cluster with other software. I doubt there is a need for MySQL cluster with RT and I'm sure there will be issue because unless something has changed, all data must fit in servers memory when using MySQL cluster and an RT DB with many tickets is a DB of several GB ;) Feasible? Overkill? Any issues? We think that with our application we will see peaks/burts of tickets submissions. We want to be able to absorb these peaks safely. can you tell us more about yout peaks, I know many big setups that just works fine with one DB. With RT, ticket submissions are often not an issue, but having a lot of queues/groups/privileged users may slow down your RT.
Re: [rt-users] RT and mySQL cluster?
On Fri, Nov 19, 2010 at 10:03:53AM -0700, Thierry Thelliez wrote: Hello all, Has anyone some experience running RT on top of MySQL Cluster? Feasible? Overkill? Any issues? We think that with our application we will see peaks/burts of tickets submissions. We want to be able to absorb these peaks safely. Cheers, Thierry Are you sure the bottle-neck is the database backend. It seems to me that most of the processing is in the webserver front-ends. If that is the case, point a second front-end to the same backend database and you will be able to handle more tickets. It is worth testing, but is your database I/O even close to 100%? Cheers, Ken
Re: [rt-users] RT and mySQL cluster?
Hi Thierry, you should tell us more about your setup, Hardware Sizing and so on. How many (concurrent) users etc. Don't think, that you will solve your problems with a mysql cluster.. Torsten 2010/11/19 Thierry Thelliez thierry.thelliez.t...@gmail.com Hello all, Has anyone some experience running RT on top of MySQL Cluster? Feasible? Overkill? Any issues? We think that with our application we will see peaks/burts of tickets submissions. We want to be able to absorb these peaks safely. Cheers, Thierry -- MFG Torsten Brumm http://www.brumm.me http://www.elektrofeld.de
Re: [rt-users] RT and mySQL cluster?
Hi Thierry, I successfull experience RT cluster on Mysql cluster All works fine on debian lenny with heartbeat (Linux HA) + DRBD (raid 1 over IP - block synchronization). The /var/lib/mysql is installed on DRBD partition Apache and RT config are setup identically on both cluster node. Regards Tanguy Le 19 nov. 2010 à 19:56, Torsten Brumm torsten.br...@googlemail.commailto:torsten.br...@googlemail.com a écrit : Hi Thierry, you should tell us more about your setup, Hardware Sizing and so on. How many (concurrent) users etc. Don't think, that you will solve your problems with a mysql cluster.. Torsten 2010/11/19 Thierry Thelliez mailto:thierry.thelliez.t...@gmail.comthierry.thelliez.t...@gmail.commailto:thierry.thelliez.t...@gmail.com Hello all, Has anyone some experience running RT on top of MySQL Cluster? Feasible? Overkill? Any issues? We think that with our application we will see peaks/burts of tickets submissions. We want to be able to absorb these peaks safely. Cheers, Thierry -- MFG Torsten Brumm http://www.brumm.mehttp://www.brumm.me http://www.elektrofeld.dehttp://www.elektrofeld.de
Re: [rt-users] RT and mySQL cluster?
Thanks all for the quick answers. In terms of sizing, we could have several thousands (max = 10,000; more realistically 3,000) tickets submissions within a day. They will not be nicely spread during the day. Some hours might be a lot busier than others. Each ticket will have at least one attachment (about 1 to 3 mb each). I am just starting to learn about MySQL Cluster, trying to find an architecture that could be robust enough to minimize data loss in case of failure. In other words, we do not want to lose hours of submitted tickets if something bad happens. Likewise, we want to provide continuity of operations even if a server goes down. From what I read in this forum, RT should be fine with the volume assuming a decent server. My concern is more about robustness. Thanks for your comments and suggestions. Thierry
Re: [rt-users] RT and mySQL cluster?
And to respond to Emmanuel's question about queues/group/privileged users, this is a simple setup... 2 queues, 5 groups, and a dozen privileged users and few hundred unprivileged ones. So I understand that this is ok? Thierry Thelliez
Re: [rt-users] RT and mySQL cluster?
You can always just use MySQL replication to keep a hot backup of the DB on another server/site. This is what we do, and it works out pretty well. Failover isn't automated in any fashion, but in theory would just be a config change to point to the new DB server. -Eric -Original Message- From: rt-users-boun...@lists.bestpractical.com [mailto:rt-users-boun...@lists.bestpractical.com] On Behalf Of Thierry Thelliez Sent: Friday, November 19, 2010 4:16 PM To: rt-users@lists.bestpractical.com Subject: Re: [rt-users] RT and mySQL cluster? Thanks all for the quick answers. In terms of sizing, we could have several thousands (max = 10,000; more realistically 3,000) tickets submissions within a day. They will not be nicely spread during the day. Some hours might be a lot busier than others. Each ticket will have at least one attachment (about 1 to 3 mb each). I am just starting to learn about MySQL Cluster, trying to find an architecture that could be robust enough to minimize data loss in case of failure. In other words, we do not want to lose hours of submitted tickets if something bad happens. Likewise, we want to provide continuity of operations even if a server goes down. From what I read in this forum, RT should be fine with the volume assuming a decent server. My concern is more about robustness. Thanks for your comments and suggestions. Thierry
Re: [rt-users] RT and mySQL cluster?
On Fri, Nov 19, 2010 at 07:14:36PM +, tanguy.lag...@bt.com wrote: Hi Thierry, I successfull experience RT cluster on Mysql cluster All works fine on debian lenny with heartbeat (Linux HA) + DRBD (raid 1 over IP - block synchronization). The /var/lib/mysql is installed on DRBD partition Apache and RT config are setup identically on both cluster node. speaking of DB, you're not using the cluster mode of MySQL, you have just a failover between those two servers which is IMHO a good setup for failover ;)
Re: [rt-users] RT and mySQL cluster?
On Fri, Nov 19, 2010 at 02:15:40PM -0700, Thierry Thelliez wrote: Thanks all for the quick answers. In terms of sizing, we could have several thousands (max = 10,000; more realistically 3,000) tickets submissions within a day. They will not be nicely spread during the day. Some hours might be a lot busier than others. Each ticket will have at least one attachment (about 1 to 3 mb each). you have to do benchmark, but here cluster mode of MySQL will not help at all (to my knowledge it may decrease performances). here I will go with good hardware (RAID 10) and one DB. I am just starting to learn about MySQL Cluster, trying to find an architecture that could be robust enough to minimize data loss in case of failure. In other words, we do not want to lose hours of submitted tickets if something bad happens. Likewise, we want to provide continuity of operations even if a server goes down. using RT on a failover architecture is pretty easy and a good idea. You just have to setup either a master/slave MySQL configuration, or drbd, or a hot backup MySQL.
Re: [rt-users] RT and mySQL cluster?
On Fri, Nov 19, 2010 at 02:27:01PM -0700, Thierry Thelliez wrote: And to respond to Emmanuel's question about queues/group/privileged users, this is a simple setup... 2 queues, 5 groups, and a dozen privileged users and few hundred unprivileged ones. So I understand that this is ok? yes ;)
Re: [rt-users] RT and mySQL cluster?
Sounds like a Overkill for your setup. Think MySQL Master/Slave is what you are looking for like Emmanuel Said. Torsten Sent from my phone, sorry for all typo's. Am 19.11.2010 um 22:27 schrieb Thierry Thelliez thierry.thelliez.t...@gmail.com: And to respond to Emmanuel's question about queues/group/privileged users, this is a simple setup... 2 queues, 5 groups, and a dozen privileged users and few hundred unprivileged ones. So I understand that this is ok? Thierry Thelliez
