[LinuxFailSafe] Scalability of Failsafe

[Dileep Matheri]

Hello All,

By browsing the Failsafe code, we understood that it supports 32 nodes.

Right now we are trying to evaluate some linux HA products. One of them
is Failsafe.
The requirement is 32 node support at this point. But in future it may
need to scale
upto 300 nodes. Our questions to the linux Failsafe community is:

1. Is Failsafe is scalable beyond 32 nodes?
2. Upto how many nodes Failsafe can scale?
3. If Failsafe can not scale more than 32, what could be the reason for
that? or what
are the problematic areas?

Thanks in advance,
Santhosh/Dileep.
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[Padmanabhan Sreenivasan]

Post by Dileep Matheri
Hello All,
By browsing the Failsafe code, we understood that it supports 32 nodes.
Right now we are trying to evaluate some linux HA products. One of them is Failsafe.
The requirement is 32 node support at this point. But in future it may need to scale
1. Is Failsafe is scalable beyond 32 nodes?

Not without changes. Some algorithms do not scale well.

Post by Dileep Matheri
2. Upto how many nodes Failsafe can scale?

It can work upto 32 nodes (there are assumptions in the
code about the max size of cluster being 32). Linux FailSafe
has been tested upto 8 nodes.

Post by Dileep Matheri
3. If Failsafe can not scale more than 32, what could be the reason for that? or what
are the problematic areas?

Cluster membership services algorithm has to be changed. This
algorithm will be the first bottleneck.

Paddy

Post by Dileep Matheri
Thanks in advance,
Santhosh/Dileep.