[infinispan-dev] HotRod client - optimize serialization
Mircea Markus
mircea.markus at jboss.com
Mon Jul 5 06:33:41 EDT 2010
On 5 Jul 2010, at 13:21, Manik Surtani wrote:
> What sort of socket do you use? Depending on this, socket.getOutputStream() may be the most efficient (if it is a zero-copy NIO buffer for example).
SocketChannel socketChannel = SocketChannel.open(serverAddress);
*socket* = socketChannel.socket();
>
> Why do you need to hang on to the byte[] representation for keys?
I need it for hashing calculation, as java hotrod client is distribution aware.
>
>
> On 5 Jul 2010, at 11:10, Mircea Markus wrote:
>
>> Hi,
>>
>> On HR we serialize the (key, value) pairs before sending them to the client.
>> Current approach is we transfer them into an byte[] using an ByteArrayInputStream/ByteArrayOutputStream and then write them over the network with socket.getOutputStream().write(byte[])
>>
>> What I'm looking for a better way of serializing, by reusing byte arrays.
>> One approach would be to use an pool of ExposedByteArrayOutputStream, pool's size being == number of tcp connections between client and server. My concern with this approach is that if one is using a large value (e.g. 100MB ) once in a blue moon, than I'll always keep an 100MB array in memory, cached, even though I don't want it.
>>
>> Another approach would be to use use existing code for keys(i.e. serialize them into an byte[]), which are expected to be smaller, and for values to write directly in the socket, through socket.getOutputStream(). This way I won't have the 100MB issue and also I won't create an byte[] for each value (I need to do that for keys though, as I need access to key's byet[] for computing its hash code).
>>
>> Any suggestions much appreciated!
>>
>> Cheers,
>> Mircea
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>
> --
> Manik Surtani
> manik at jboss.org
> Lead, Infinispan
> Lead, JBoss Cache
> http://www.infinispan.org
> http://www.jbosscache.org
>
>
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>
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