That's great advice. Thanks!
On Mon, Jun 26, 2017 at 8:56 PM Vladimir Kuznetsov <[email protected]> wrote: > Hi Carlos, > > Here's the reply (to the question I originally asked) I've got on parallel > Dev mailing list. Probably this helps answering your question: > > The answer is slightly different depending if you're using 1.x/2.0 releases > or current master. > > If you're using 1.x or 2.0 release: Set "max_replication_retry_count = > infinity" so it will always retry failed replications. That setting > controls how the whole replication job restarts if there is any error. Then > "retries_per_request" can be used to handle errors for individual > replicator HTTP requests. Basically the case where a quick immediate retry > succeeds. The default value for "retries_per_request" is 10. After the > first failure, there is a 0.25 second wait. Then on next failure it doubles > to 0.5 and so on. Max wait interval is 5 minutes. But If you expect to be > offline routinely, maybe it's not worth retrying individual requests for > too long so reduce the "retries_per_request" to 6 or 7. So individual > requests would retry a few times for about 10 - 20 seconds then the whole > replication job will crash and retry. > > If you're using current master, which has the new scheduling replicator: No > need to set "max_replication_retry_count", that setting is gone and all > replication jobs will always retry for as long as replication document > exists. But "retries_per_request" works the same as above. Replication > scheduler also does exponential backoffs when replication jobs fail > consecutively. First backoff is 30 seconds. Then it doubles to 1 minute, 2 > minutes, and so on. Max backoff wait is about 8 hours. But if you don't > want to wait 4 hours on average for the replication to restart when network > connectivity is restored, and want to it be about 5 minutes or so, set > "max_history = 8" in the "replicator" config section. max_history controls > how much history of past events are retained for each replication job. If > there is less history of consecutive crashes, that backoff wait interval > will also be shorter. > > So to summarize, for 1.x/2.0 releases: > > [replicator] > max_replication_retry_count = infinity > retries_per_request = 6 > > For current master: > > [replicator] > max_history = 8 > retries_per_request = 6 > > Cheers, > -Nick > > > > On Jun 21, 2017, at 1:40 AM, Carlos Alonso <[email protected]> > wrote: > > > > Hi guys, > > > > What happens after the *retries_per_request* retries limit is reached? Is > > the replication stopped? How is it notified? We're experiencing 'frozen' > > replications from time to time and I was wondering if that may be the > > case... But I think we're not seeing anything in the logs... > > > > Regards > > > > On Tue, Jun 20, 2017 at 6:22 PM Vladimir Kuznetsov <[email protected]> > > wrote: > > > >> Thank you Eric! > >> > >> Forgot to mention, I'm using 2.0, just got a reply in parallel thread so > >> it looks like this behavior is the same for 1.6 and 2.0. > >> > >> --Vovan > >> > >>> On Jun 20, 2017, at 5:30 AM, Eiri <[email protected]> wrote: > >>> > >>> Hi Vovan, > >>> > >>> If we are talking Couch 1.6, the attribute *retries_per_request* > >> controls a number of attempts a current replication is going to do to > read > >> _changes feed before giving up. The attribute > *max_replication_retry_count* > >> controls a number of attempts the whole replication job is going to be > >> retried by a replication manager. Setting this attribute to “infinity” > >> should make the replicaton manager to never give up. > >>> > >>> I don’t think the interval between those attempts is configurable. As > >> far as I understand it’s going to start from 2.5 sec between the retries > >> and then double until reached 10 minutes, which is going to be hard > upper > >> limit. > >>> > >>> > >>> Regards, > >>> Eric > >>> > >>>> On Jun 20, 2017, at 00:31, Vladimir Kuznetsov <[email protected]> > >> wrote: > >>>> > >>>> Hi, > >>>> > >>>> I'm currently exploring CouchDB replication and trying to figure out > >> the difference between *max_replication_retry_count* and > >> *retries_per_request* configuration options in *[replicator]* section of > >> configuration file. > >>>> > >>>> Basically I want to configure continuous replication of local couchdb > >> to the remote instance that would never stop replication attempts, > >> considering potentially continuous periods of being offline(days or even > >> weeks). So, I'd like to have infinite replication attempts with maximum > >> retry interval of 5 minutes or so. Can I do this? Do I need to change > >> default configuration to achieve this? > >>>> > >>>> thanks, > >>>> --Vovan > >>> > >> > >> -- > > [image: Cabify - Your private Driver] <http://www.cabify.com/> > > > > *Carlos Alonso* > > Data Engineer > > Madrid, Spain > > > > [email protected] > > > > Prueba gratis con este código > > #CARLOSA6319 <https://cabify.com/i/carlosa6319> > > [image: Facebook] <http://cbify.com/fb_ES>[image: Twitter] > > <http://cbify.com/tw_ES>[image: Instagram] <http://cbify.com/in_ES > >[image: > > Linkedin] <https://www.linkedin.com/in/mrcalonso> > > > > -- > > Este mensaje y cualquier archivo adjunto va dirigido exclusivamente a su > > destinatario, pudiendo contener información confidencial sometida a > secreto > > profesional. No está permitida su reproducción o distribución sin la > > autorización expresa de Cabify. 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