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From Mradul Maheshwari <mra...@apporbit.com>
Subject Re: Empty snapshot created
Date Fri, 10 Jun 2016 04:41:31 GMT
Hi Ben,
Many thanks.
I had tried this command earlier too but I guess my syntax was wrong. This
time I just issued
nodetool rebuild dc1
and took the snapshot after this. I could see the *.db files created.

Earlier I was trying
nodetool rebuild -- dc1
which I guess was wrong.

Thanks for the lightning response.

Regards,
Mradul


On Fri, Jun 10, 2016 at 9:52 AM, Ben Slater <ben.slater@instaclustr.com>
wrote:

> After adding a DC you need to run nodetool rebuild. See the procedure
> here:
> https://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_add_dc_to_cluster_t.html
>
> Cheers
> Ben
>
> On Fri, 10 Jun 2016 at 14:17 Mradul Maheshwari <mradul@apporbit.com>
> wrote:
>
>> Hi,
>> I am facing an issue when taking snapshots.
>>
>> The details of the setup are as follows
>>
>>    1. Cassandra Version 3.5
>>    2. I have a keyspace named *other_map* with '*NetworkTopologyStrategy*'
>>    and replication factor 1 for 'dc1'
>>    3. Added another datacenter 'dc2' in the existing cluster
>>    4. Modified  other_map keyspace using the *ALTER* command.
>>    5. After this Logged on on the node on dc2 datacenter and issued the *nodetool
>>    snapshot* command for the other_map keyspace.
>>    6. As a result a directory is created in the other_keyspace/<table
>>    name>/snapshot/<time-stamp>. This contains only a manifest,json file
which
>>    has no information about any files.
>>
>> <cat content of manifest.json>
>> *cat
>> data/data/other_map/country-f34a28d02b1511e689afc7a4a4b2ee40/snapshots/1465457086678/manifest.json*
>>
>> *{"files":[]}*
>>
>> </cat content of manifest.json>
>>
>> Am I missing any thing here? Are the above mentioned steps complete?
>>
>> After altering the keyspace I have tried a *nodetool repair* command
>> which had also not changed anything.
>>
>> Regards,
>> Mradul
>>
>>
>> Information about schema follows
>>
>> CREATE KEYSPACE other_map WITH replication = {'class':
>> 'NetworkTopologyStrategy', 'dc': '1', 'dc2': '2'}  AND durable_writes =
>> true;
>>
>> CREATE TABLE other_map.country (
>>     id int PRIMARY KEY,
>>     name text,
>>     states int
>> ) WITH bloom_filter_fp_chance = 0.01
>>     AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
>>     AND comment = ''
>>     AND compaction = {'class':
>> 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy',
>> 'max_threshold': '32', 'min_threshold': '4'}
>>     AND compression = {'chunk_length_in_kb': '64', 'class':
>> 'org.apache.cassandra.io.compress.LZ4Compressor'}
>>     AND crc_check_chance = 1.0
>>     AND dclocal_read_repair_chance = 0.1
>>     AND default_time_to_live = 0
>>     AND gc_grace_seconds = 864000
>>     AND max_index_interval = 2048
>>     AND memtable_flush_period_in_ms = 0
>>     AND min_index_interval = 128
>>     AND read_repair_chance = 0.0
>>     AND speculative_retry = '99PERCENTILE';
>>
>> --
> ————————
> Ben Slater
> Chief Product Officer, Instaclustr
> +61 437 929 798
>

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