Hey Matt, Sorry for the long response time, I was in a nick of deadline and didn’t notice the email.
I also don’t know if james generate the ID or not, but lately I’ve been able to apply Percona Xtradb Cluster to my database. With some configuration, percona already automatically sync-up the databases in all my 3 nodes server with just some configuration. Turns out Percona was just an “extension” for a database to be able to sync with other database. Although I cant say much how im gonna handle the creation of ID, but for now its answer my question, I guess it would be for future answer. If I can learn how the ID of the mail was made I would surely try to implement your UNIX timestamp idea, seems like a good method also. Again, thank you for the feedback. Sincerely, Jason Sent from Mail for Windows 10 From: cryptearth Sent: Saturday, August 3, 2019 12:00 PM To: server-user@james.apache.org Subject: RE: About database Clustering on james server Hey Jason, I thought again about the database sync and ID conflicts: I don't know if james generates the id or if the database does, but no matter where the id is generated it should be possible to modify it to be a unix timestamp instead of a counter. Reason: it's very unlikely that two instance in a master-slave config (that's a primary server with a backup) have a id generated at the same timestamp. This way not only a replication from master down two slave is possible but also from slave back up to the master. It would need a bit of rewrite some lines of source and the database queries - but should be doable. If I'm correct the current unix timestamp may fit in a signed integer - but long would be better. Matt ---- Jason Tjankilisan schrieb ---- >Hiya matt, > >Sorry for the delay reply, > >Thank you for the idea. As for the workaround for the ID Conflict, that;s why >I want to use Percona / Galera cluster, co-worker said that they have >automated system about the conflict ID. But for starter, I will try to >implement that master-slave sync to james. For the ID- Problem, some people >said that : each server (example 2 server) can only create specific number of >sequence, Server 1 can only create ID 1,3,5 and so on while Server 2 can only >create ID 2,4,6 and so on to avoid conflict. > >How things coded and how it works , detect if my server back up online and >syncing up everything is still unknown to me. But at least I have an idea how >things work. But im guessing firstly I have to create a custom Mailet and >using javamail to send the “unsynchronized” message to all server when its >back online. > >Thank you for the suggestion / Idea , sorry for any wrong word . > >Sincerely, Jason > >Sent from Mail for Windows 10 > >From: cryptearth >Sent: Friday, July 19, 2019 4:50 PM >To: server-user@james.apache.org >Subject: Re: About database Clustering on james server > >Hey Jason, > >it's not clustering in the multi-directional way but I use master-slave >sync for my setup: On my root-server my main instance run - and at home >my backup instance sync each night. There's this one main issue: When >mails get delivered to my backup at home they don't sync back up to the >main - and may can get lost when mails on the root already taken IDs >wich my backup assigned to other mails. So it's not the best to use in >production as ID-conflicts can happen wich only can be handled by James >itself. The other idea I can come up with would be to use IMAP to sync >the mails instead of sync the databases cause as said James has to >handel possible ID conflicts wich could occur when try to sync multiple >instances. > >Matt > >Am 19.07.2019 um 06:46 schrieb Jason Tjankilisan: >> Halo, >> Im curios if james can be modified to have Database Clustering. Since James >> can use MariaDB and Mysql.Assuming it can, is it better to choose Mysql >> Percona XtraDB Cluster, or MariaDB Galera Cluster? we already have 3 James >> server ready to be synchronized for database clustering. >> Our team agree to implement Percona Extradb Cluster since many people said >> has better perfomance than MariaDB Galera Cluster,but i did want to know >> which suit better for james? Also considering the statement that mysql been >> bought by Sun and changing the license so redistributing it wouldn't be easy >> as before (might have to read more about this) Re: Applying JDKIM and SPF to >> the Mailets >> After some reading on server-user archive, Clustering isnt available on >> james last time, is it available now? there's many different opinion and >> thought, can anybody shed some light? >> Re: Clustering James 2.3 -> Im not really sure if this was clustering >> Does james-ha work well? -> using one database on mutiple james server, so >> i guess its the oposite of clustering >> Does james support cluster in order to build a mail delivery cluster? -> i >> want to believe the answer but there;s no further explanation >> https://www.mail-archive.com/server-user@james.apache.org/msg15622.html -> >> im guessing clustering is too heavy for james to handle? >> >> >> | | | >> Does james support cluster in order to ... >> | >> >> >> >> >> >> >> | | | >> Does james-ha work well? >> | >> >> >> >> >> >> >> | | | >> Re: Clustering James 2.3 >> | >> >> >> >> >> >> >> | | | >> Re: Applying JDKIM and SPF to the Mailets >> | >> >> >> >> > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org >For additional commands, e-mail: server-user-h...@james.apache.org > >
