Hi,
I've got another question regarding the connection limit. I sometimes
get the following warning in my zookeeper log file:
15:33:46,351 - WARN
[NIOServerCxn.Factory:2181:nioservercnxn$fact...@226] - Too many
connections from /A.B.C.D - max is 10
However, I don't have maxClientCnxns defined
I'm afraid the docs are wrong, it's being fixed in 3.3.0:
https://issues.apache.org/jira/browse/ZOOKEEPER-681
set the value to 0 if you want unlimited.
Patrick
Michael Bauland wrote:
Hi,
I've got another question regarding the connection limit. I sometimes
get the following warning in my
it is a bit confusing but initLimit is the timer that is used when a
follower connects to a leader. there may be some state transfers
involved to bring the follower up to speed so we need to be able to
allow a little extra time for the initial connection.
after that we use syncLimit to figure
Michael Bauland wrote:
- When I connect with a client to the Zookeeper ensemble I provide the
three IP addresses of my three Zookeeper servers. Does the client then
choose one of them arbitrarily or will it always try to connect to the
first one first? I'm asking since I would like to have my
On top of Ben's description, you probably need to set initLimit to
several minutes to transfer 700MB (worst case). The value of
syncLimit, however, does not need to be that large.
-Flavio
On Mar 15, 2010, at 7:24 PM, Benjamin Reed wrote:
it is a bit confusing but initLimit is the timer
Hi:
I am puzzled by the Zookeeper Admin Guide's advice on choosing Java heap
size:
Set the Java heap size. This is very important to avoid swapping, which
will seriously degrade ZooKeeper performance. To determine the correct
value, use load tests, and make sure you are well below the usage limit
Your understanding is correct. But if you set a heap size nearly as big as
your physical memory (or larger) then java may allocate that heap which will
cause swapping.
So swapping is definitely done by the OS, but it is the applications like
Java that can cause the OS to do it.
On Mon, Mar 15,
Hi everybody,
From what i understand Zookeeper consistency model work the same way as does
Scalaris.
Which is to keep the majority of the replica for an item UP.
In Scalaris i
f a single failed node does crash and recover, it simply start like a fresh
new node and all data is lost.
This is the
Thanks a lots it's much clearer now.
When i say more replicas i don't mean the number of node but the number of
copy of an item value.
This was my misunderstanding because in Scalaris the item value is
replicated when node join and leave the DHT.
So this is all about the operation log so if a
I don't think that you have considered the impact of ordered updates here.
On Mon, Mar 15, 2010 at 6:19 PM, Maxime Caron maxime.ca...@gmail.comwrote:
So this is all about the operation log so if a node is in minority but
have more recent committed value this node is in Veto over the other
The advantages of a DHT often include:
1. bounded size routes
2. load balancing
3. dynamic membership
at the cost of only making very weak consistency guarantees. Typically a DHT
is used for very read heavy workloads - such as CDNs - where the p2p
approach is very scalable. But it's extremely
I like to say that the cost of now goes up dramatically with diameter.
On Mon, Mar 15, 2010 at 7:50 PM, Henry Robinson he...@cloudera.com wrote:
There is
a fundamental tension between synchronicity of updates and scale.
Well JVM's default maximum heap size is 64M according to
thishttp://forums.sun.com/thread.jspa?threadID=715348
.
I think this is a doc bug.
Sorry I was too terse - I meant to say the default JVM heap size setting
probably fits the need of most applications. Singling out this setting in
Zookeeper Admin Guide is confusing rather than helping.
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