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Posted to user@zookeeper.apache.org by Gokul <go...@gmail.com> on 2016/06/20 10:13:48 UTC
Observer doesn't write transactions?
Hi,
I am using ZK version 3.4.5
I was running a 3 ZK servers locally with an Observer and observed that
Observer stores each transaction it gets from leader only in in-memory
snapshot and doesn't write the transaction to transaction log in disk. Is
this the expected behaviour or am I missing some config parameter?
Re: Observer doesn't write transactions?
Posted by Gokul <go...@gmail.com>.
Found the answer to my question. This has been fixed in 3.4.6 and 3.5.0
https://issues.apache.org/jira/browse/ZOOKEEPER-1552
On Mon, Jun 20, 2016 at 4:11 PM, Gokul <go...@gmail.com> wrote:
> Hi Rakesh,
>
> I am testing locally. 2 servers(1 leader, 1 follower) and 1 observer
>
> *Server1*
>
> # The number of milliseconds of each tick
>
> tickTime=2000
>
> # The number of ticks that the initial
>
> # synchronization phase can take
>
> initLimit=10
>
> # The number of ticks that can pass between
>
> # sending a request and getting an acknowledgement
>
> syncLimit=5
>
> # the directory where the snapshot is stored.
>
> dataDir=/tmp/zookeeper
>
> # the port at which the clients will connect
>
> clientPort=2181
>
> server.1=0.0.0.0:2888:3888
>
> server.2=0.0.0.0:4888:5888
>
> server.3=0.0.0.0:6888:7888:observer
>
> *Server 2*
>
> # The number of milliseconds of each tick
>
> tickTime=2000
>
> # The number of ticks that the initial
>
> # synchronization phase can take
>
> initLimit=10
>
> # The number of ticks that can pass between
>
> # sending a request and getting an acknowledgement
>
> syncLimit=5
>
> # the directory where the snapshot is stored.
>
> dataDir=/tmp/zookeeper2
>
> # the port at which the clients will connect
>
> clientPort=3181
>
> server.1=0.0.0.0:2888:3888
>
> server.2=0.0.0.0:4888:5888
>
> server.3=0.0.0.0:6888:7888:observer
> *Server 3 ( Observer ) conf:*
>
> # The number of milliseconds of each tick
>
> tickTime=2000
>
> # The number of ticks that the initial
>
> # synchronization phase can take
>
> initLimit=10
>
> # The number of ticks that can pass between
>
> # sending a request and getting an acknowledgement
>
> syncLimit=5
>
> # the directory where the snapshot is stored.
>
> dataDir=/tmp/zookeeper3
>
> # the port at which the clients will connect
>
> clientPort=4181
>
> server.1=0.0.0.0:2888:3888
>
> server.2=0.0.0.0:4888:5888
>
> server.3=0.0.0.0:6888:7888:observer
>
> peerType=observer
>
> On Mon, Jun 20, 2016 at 3:59 PM, Rakesh Radhakrishnan <
> rakeshr.apache@gmail.com> wrote:
>
>> Hey Gokul,
>>
>> Observer will write the transactions into the log file like other Follower
>> servers. Could you share the server side configurations. Also, can you
>> compare the Observer configurations with other Follower in your cluster to
>> see any differences.
>>
>> Regards,
>> Rakesh
>>
>> On Mon, Jun 20, 2016 at 3:43 PM, Gokul <go...@gmail.com> wrote:
>>
>> > Hi,
>> >
>> > I am using ZK version 3.4.5
>> >
>> > I was running a 3 ZK servers locally with an Observer and observed that
>> > Observer stores each transaction it gets from leader only in in-memory
>> > snapshot and doesn't write the transaction to transaction log in disk.
>> Is
>> > this the expected behaviour or am I missing some config parameter?
>> >
>>
>
>
>
> --
> Thanks and Regards,
> Gokul
>
--
Thanks and Regards,
Gokul
Re: Observer doesn't write transactions?
Posted by Gokul <go...@gmail.com>.
Hi Rakesh,
I am testing locally. 2 servers(1 leader, 1 follower) and 1 observer
*Server1*
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
server.1=0.0.0.0:2888:3888
server.2=0.0.0.0:4888:5888
server.3=0.0.0.0:6888:7888:observer
*Server 2*
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
dataDir=/tmp/zookeeper2
# the port at which the clients will connect
clientPort=3181
server.1=0.0.0.0:2888:3888
server.2=0.0.0.0:4888:5888
server.3=0.0.0.0:6888:7888:observer
*Server 3 ( Observer ) conf:*
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
dataDir=/tmp/zookeeper3
# the port at which the clients will connect
clientPort=4181
server.1=0.0.0.0:2888:3888
server.2=0.0.0.0:4888:5888
server.3=0.0.0.0:6888:7888:observer
peerType=observer
On Mon, Jun 20, 2016 at 3:59 PM, Rakesh Radhakrishnan <
rakeshr.apache@gmail.com> wrote:
> Hey Gokul,
>
> Observer will write the transactions into the log file like other Follower
> servers. Could you share the server side configurations. Also, can you
> compare the Observer configurations with other Follower in your cluster to
> see any differences.
>
> Regards,
> Rakesh
>
> On Mon, Jun 20, 2016 at 3:43 PM, Gokul <go...@gmail.com> wrote:
>
> > Hi,
> >
> > I am using ZK version 3.4.5
> >
> > I was running a 3 ZK servers locally with an Observer and observed that
> > Observer stores each transaction it gets from leader only in in-memory
> > snapshot and doesn't write the transaction to transaction log in disk. Is
> > this the expected behaviour or am I missing some config parameter?
> >
>
--
Thanks and Regards,
Gokul
Re: Observer doesn't write transactions?
Posted by Rakesh Radhakrishnan <ra...@gmail.com>.
Hey Gokul,
Observer will write the transactions into the log file like other Follower
servers. Could you share the server side configurations. Also, can you
compare the Observer configurations with other Follower in your cluster to
see any differences.
Regards,
Rakesh
On Mon, Jun 20, 2016 at 3:43 PM, Gokul <go...@gmail.com> wrote:
> Hi,
>
> I am using ZK version 3.4.5
>
> I was running a 3 ZK servers locally with an Observer and observed that
> Observer stores each transaction it gets from leader only in in-memory
> snapshot and doesn't write the transaction to transaction log in disk. Is
> this the expected behaviour or am I missing some config parameter?
>