Nic Eggert created GIRAPH-1136:
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Summary: Giraph no longer checkpoints loading input
Key: GIRAPH-1136
URL: https://issues.apache.org/jira/browse/GIRAPH-1136
Project: Giraph
Issue Type: Bug
Components: bsp
Affects Versions: 1.2.0
Reporter: Nic Eggert
>From Practical Analytics with Apache Giraph:
{quote}
If checkpoints are enabled, you are guaranteed to have the initial graph data
safely stored in HDFS.
{quote}
Looking at the current code in
{{o.a.g.master.BspServiceMaster:getCheckpointStatus}}, it looks like this is no
longer the case. After a little bit of digging, it looks like this change was
introduced here:
https://github.com/apache/giraph/commit/5adca63deca25d84f4fdea053c35a85efc8bbb3d#diff-e16fdec9e3f573eba64cfe6eab512e19L657
(GIRAPH-993)
Was this change intentional? It seems like an initial checkpoint would be
desirable (I have a job where 1/3 of the runtime is spent loading input splits).
The simplest fix would be to just add a special case for Superstep 0. If that's
acceptable, I'd be happy to submit a PR.
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