Re: Latency issues

Asaf,

See below answers:

2 computers are putting new objects in, and 98 computers are collecting the
objects.



1.       Are the objects inserted into java-spaces stored on multiple
computers (for redundancy)?

With GigaSpaces implementation - when running clustered space - YES. See:

http://www.gigaspaces.com/wiki/display/GS/Replicated+Space+Topology

http://www.gigaspaces.com/wiki/display/GS/Failover+Group+-+Cluster+Schema



2.       If so, Does java-spaces guarantee that only one of the computers
collecting the objects will get a specific object?

When using primary-backup or partitioned-sync2Backup space cluster schema -
YES.

http://www.gigaspaces.com/wiki/display/GS/Space+Cluster+Topologies



3.       Are all of the computers sharing the same java-space aware of all
the objects inserted into the java-space?

You can do this explicitly using notifications:

http://www.gigaspaces.com/wiki/display/GS/JavaSpaces+Notifications

The JavaSpaces specification supports events delivery for write operations.

GigaSpaces supports also notifications for take , lease expiration and
update operations.



Or implicitly via local-Cache or Local View:

http://www.gigaspaces.com/wiki/display/GS/Master-Local+Space

http://www.gigaspaces.com/wiki/display/GS/Space+Local+View





4.       Are the objects replicated to all of the computers sharing the same
java-space?

With GigaSpaces - Logically - yes. Physically - No.

The clustered space from the client point of view looks at a single space.
But physically the difference space instanced that form the clustered space
running on different machines.



Best Regards,
        Shay

----------------------------------------------------
Shay Hassidim
GigaSpaces Technologies
Write Once. Scale Anywhere.
Email: [email protected]
Website: www.gigaspaces.com

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  _____

From: asaf.lahav [mailto:[email protected]]
Sent: Sunday, February 18, 2007 5:02 AM
To: [email protected]
Subject: Latency issues



Hi all,



I am new to JavaSpaces. so bare with me :-)

Let's say I have 100 computers sharing the same Java-Space.

2 computers are putting new objects in, and 98 computers are collecting the
objects.



5.       Are the objects inserted into java-spaces stored on multiple
computers (for redundancy)?

6.       If so, Does java-spaces guarantee that only one of the computers
collecting the objects will get a specific object?

7.       Are all of the computers sharing the same java-space aware of all
the objects inserted into the java-space?

8.       Are the objects replicated to all of the computers sharing the same
java-space?



Thanks in advance

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