Hi Bill, On Mar 3, 3:54 pm, Bill Moseley <mose...@hank.org> wrote: > On Thu, Mar 3, 2011 at 9:54 AM, Felipe Cerqueira <skylaz...@gmail.com>wrote: > > > Hi, > > > Its works for me on version 0.45 with C. > > Well, perhaps I'm not configuring the client correctly. See below. > > > > > I didnt like of this behavior but its works. > > > The concept of master and slave dont exist. So, if its get a error > > trying to send data to the hash(key)->server, its dont send data to > > the others server(s). > > Are you saying that even with " MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS" set > to 1 if the first server write fails then it won't write to the second? > That is, once a server fails only reads work?
First of all, replication is only for write. Internally, its wont ask for a second server. About your question, its really wont replicate the data if fails on first server. You can see it on the source code of libmemcached: See: http://goo.gl/JSSro I dont like this behaivor too. > > Here's a simple test script using the most recent Perl version with output > below. Am I not setting this up correctly? > > use Memcached::libmemcached qw( :memcached_behavior_t ); > use strict; > use warnings; > > my $memc = Memcached::libmemcached->new; > $memc->memcached_behavior_set( MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS() => 1 > ); > > $memc->memcached_server_add( 'localhost', 11211 ); > $memc->memcached_server_add( 'localhost', 11212 ); > > my $mem1 = Memcached::libmemcached->new; > $mem1->memcached_server_add( 'localhost', 11211 ); > > my $mem2 = Memcached::libmemcached->new; > $mem2->memcached_server_add( 'localhost', 11212 ); > > printf "Running libmemcached version %s\n", > Memcached::libmemcached::memcached_lib_version(); > The replication only works with binary mode. Did you set it up? And, remember, this feature is only for replication data, not consulting (get). I have tested on libmemcached with C. I dont known about perl. > for ( 1 .. 8 ) { > > my $id = int rand 1000; > > print "\n============= key $id =============\n"; > $memc->memcached_set( $id, 1, 10 ) > || die 'set failed "' . $memc->errstr . "'\n"; > > my ( $flag, $rc ); > > $mem1->memcached_get( $id, $flag, $rc ) > && print "found in mem1\n"; > > $mem2->memcached_get( $id, $flag, $rc ) > && print "found in mem2\n"; > > } > > Running this I see -- not it's only finding the key in one server. > > Running libmemcached version 0.44 > > ============= key 869 ============= > found in mem2 > > ============= key 321 ============= > found in mem1 > > ============= key 618 ============= > found in mem1 > > ============= key 234 ============= > found in mem2 > > ============= key 667 ============= > found in mem1 > > ============= key 54 ============= > found in mem2 > > ============= key 441 ============= > found in mem1 > > ============= key 178 ============= > found in mem1 > > One thing I always find odd is if I don't have Memcached running I get: > > set failed "SYSTEM ERROR Success' > > Does that mean a successful system error? ;) > > -- > Bill Moseley > mose...@hank.org
