Hi Jérôme,
The code in 2.2.6 allows -local and
-pr:https://github.com/apache/cassandra/blob/cassandra-2.2.6/src/java/org/apache/cassandra/service/StorageService.java#L2899
But... the options validation introduced in CASSANDRA-6455 seems to break this
feature!https://github.com/apache/cassandra/blob/cassandra-2.2.6/src/java/org/apache/cassandra/repair/messages/RepairOption.java#L211
I suggest to open a ticket https://issues.apache.org/jira/browse/cassandra/
Best,
Romain
Le Vendredi 19 août 2016 11h47, Jérôme Mainaud <[email protected]> a écrit
:
Hello,
I've got a repair command with both -pr and -local rejected on an 2.2.6 cluster.
The exact command was : nodetool repair --full -par -pr -local -j 4
The message is “You need to run primary range repair on all nodes in the
cluster”.
Reading the code and previously cited CASSANDRA-7450, it should have been
accepted.
Did anyone meet this error before ?
Thanks
--
Jérôme Mainaud
[email protected]
2016-08-12 1:14 GMT+02:00 kurt Greaves <[email protected]>:
-D does not do what you think it does. I've quoted the relevant documentation
from the README:
Multiple Datacenters
If you have multiple datacenters in your ring, then you MUST specify the name
of the datacenter containing the node you are repairing as part of the
command-line options (--datacenter=DCNAME). Failure to do so will result in
only a subset of your data being repaired (approximately
data/number-of-datacenters). This is because nodetool has no way to determine
the relevant DC on its own, which in turn means it will use the tokens from
every ring member in every datacenter.
On 11 August 2016 at 12:24, Paulo Motta <[email protected]> wrote:
> if we want to use -pr option ( which i suppose we should to prevent duplicate
> checks) in 2.0 then if we run the repair on all nodes in a single DC then it
> should be sufficient and we should not need to run it on all nodes across
> DC's?
No, because the primary ranges of the nodes in other DCs will be missing
repair, so you should either run with -pr in all nodes in all DCs, or restrict
repair to a specific DC with -local (and have duplicate checks). Combined -pr
and -local are only supported on 2.1
2016-08-11 1:29 GMT-03:00 Anishek Agarwal <[email protected]>:
ok thanks, so if we want to use -pr option ( which i suppose we should to
prevent duplicate checks) in 2.0 then if we run the repair on all nodes in a
single DC then it should be sufficient and we should not need to run it on all
nodes across DC's ?
On Wed, Aug 10, 2016 at 5:01 PM, Paulo Motta <[email protected]> wrote:
On 2.0 repair -pr option is not supported together with -local, -hosts or -dc,
since it assumes you need to repair all nodes in all DCs and it will throw and
error if you try to run with nodetool, so perhaps there's something wrong with
range_repair options parsing.
On 2.1 it was added support to simultaneous -pr and -local options on
CASSANDRA-7450, so if you need that you can either upgade to 2.1 or backport
that to 2.0.
2016-08-10 5:20 GMT-03:00 Anishek Agarwal <[email protected]>:
Hello,
We have 2.0.17 cassandra cluster(DC1) with a cross dc setup with a smaller
cluster(DC2). After reading various blogs about scheduling/running repairs
looks like its good to run it with the following
-pr for primary range only -st -et for sub ranges -par for parallel -dc to make
sure we can schedule repairs independently on each Data centre we have.
i have configured the above using the repair utility @
https://github.com/BrianGallew /cassandra_range_repair.git
which leads to the following command :
./src/range_repair.py -k [keyspace] -c [columnfamily name] -v -H localhost -p
-D DC1
but looks like the merkle tree is being calculated on nodes which are part of
other DC2.
why does this happen? i thought it should only look at the nodes in local
cluster. however on nodetool the -pr option cannot be used with -local
according to docs @https://docs.datastax.com/en/ cassandra/2.0/cassandra/tools/
toolsRepair.html
so i am may be missing something, can someone help explain this please.
thanksanishek
--
Kurt [email protected]
