I must admit, last time I played with recache was long time ago, so I may not up-to-date with the latest details.
Re load-balancer, just take my notes regarding latency and throughput. Sent from my iPhone On 17 באוק 2012, at 09:15, Kiran Kumar <krn1...@gmail.com> wrote: > Thanks for your response and taking time to answer , As far as i know > Repcahe patch installed on Memcache is only for providing the replication > of Data with in the Servers and nothing to do with Load Balancing concept . > > and i guess initially once the request is recievied from Client , the > Memcache Framework itself takes care of distributing the Load / > Requests among the servers of Memcache , So i guess both will be Memcache > Servers will be participating as active active nodes (correct me if i am > wrong here ) > > So i guess it is not that as you said "*Memcache only writes to Master* " > is not correct , correct me if i am wrong here > > > So what do you say installing a Load Balancer only for checking the Heart > Beat Makes sense here ?? > > Please share your ideas > > > And as you said , Compare the "curr_items" of the stats command from both > nodes for testing purose , but how can i really differentiate Data between > the two Memcache Servers , as far as i know each of the Server will be > having same Set of Data as Repcache patch is applied to them ?? > > > > > On Wednesday, 17 October 2012 12:02:25 UTC+5:30, Yiftach wrote: >> >> >> >> On Tue, Oct 16, 2012 at 8:55 PM, Kiran Kumar <krn...@gmail.com<javascript:> >>> wrote: >> >>> Thank you very much . >>> >>> Another question , If i dont use a LoadBalancer , Will the two Memcache >>> Servers (Server1 and Server2) with repcache installed on them , will they >>> be like active active cluster ?? >>> >> >> >>> >>> Means , will the load (requests from memcache client ) would be >>> distributed between them ?? before the data is replicated between them , >>> Or is it that only one Memcache server will recieve all the requests ?? >>> >> >> AFAIK repcache is based on a master/slave architecture, you can only write >> to master but can read from both master and slave. You should take into >> account that the slave might not be instatntly synced with the latest write >> operations on the master >> >>> >>> >>> If the load is equaly distributed between the Memcache Servers , is there >>> anyway i can test this that load is equally being distributed between the >>> two servers ?? (As i cant test this currently, after applying Repcache >>> patch to it ) >>> >> >> Compare the "curr_items" of the stats command from both nodes >>> >>> >>> >>> >>> On Tuesday, 16 October 2012 22:42:29 UTC+5:30, Yiftach wrote: >>> >>>> You should take the following into account: >>>> 1. LB will add another network hop and therefore extra latency for each >>>> request >>>> 2. Depending on the throughput of your Memcached servers, LB will >>>> probably be the bottleneck (unless you are using HW based LB which is too >>>> expensive) >>>> >>>> >>>> On Tue, Oct 16, 2012 at 5:39 PM, Kiran Kumar <krn...@gmail.com> wrote: >>>> >>>>> Hi , >>>>> I am using two Memcache servers (Server1 and Server2) with Repcached >>>>> patch installed on those for replication purpose . >>>>> With the help of repcached patch , data is being replicated on both the >>>>> servers and its working fine . >>>>> >>>>> I have some questions with respect to the above the way its working . >>>>> >>>>> 1. Is introducing a Load Balancer in front of these two Memcache >>>>> servers to distribute Data is a Good Solution ?? >>>>> Will this help in maintaining equal load between the two servers ?? >>>>> >>>>> >>>>> *Please share your experience on distributing Load between two >>>>> Memcache servers (with Repcaced patch on them )by using a Load Balancer >>>>> * >>>>> >>>>> >>>>> Thanks . >>>>> >>>> >>>> >>>> >>>> -- >>>> >>>> Yiftach Shoolman >>>> +972-54-7634621 >>>> >>>> >> >> >> -- >> >> Yiftach Shoolman >> +972-54-7634621 >>
