Ok you ran into a little bit of an unsolved issue here:
Arangodb does not alow the import into the "others" collection if a
document has the _key attribute, because you specified "vertex" as sharding
attribute.
ArangoDB needs to guarantee the uniqueness of the _key attribute, but in a
cluster we can only support this by generating a new _key attribute
(Otherwise imports would be much slower, because we would need to check
each shard ).
I will add a new option to arangoimp to allow slectively ignoring keys,
until then the only workaround is to either remove the "_key" from
the exported data files or to rename it.
On Friday, August 25, 2017 at 12:47:56 PM UTC+2, Mike Atambo wrote:
>
> We created a db with sharded collections, as instructed for Pregel:
>
> db._create("main", {shardKeys:['_key'],numberOfShards: 8})
> db._create( "others", { distributeShardsLike:"main" ,numberOfShards: 8})
> ...
> db._createEdgeCollection( "links", { distributeShardsLike:"main" ,
> shardKeys:['vertex'],numberOfShards: 8 })
> ...
>
> But when we export and import the data to another cluster we always get
> this:
>
> 2017-08-25T09:47:04Z [9839] ERROR must not specify _key for this
> collection: got error from server: HTTP 400 (Bad Request): ArangoError
> 1466: must not specify _key for this collection: must not specify _key for
> this collection
>
> The code in the error is listed here:
> https://docs.arangodb.com/3.2/Manual/Appendix/ErrorCodes.html#ERROR_CLUSTER_MUST_NOT_SPECIFY_KEY
> ,
> so surely there is something we are doing wrong, and there is a right way
> to dump and restore. How are we to do this?
>
> How should we restore data from "Pregel" ready databases?
>
> Backup command we are using:
> arangodump --output-directory "landman.$(date +%Y-%m-%d:%H:%M:%S)"
> --include-system-collections true
> Restore command we are using:
> arangorestore --create-collection true --import-data true
> --include-system-collections true --recycle-ids true --input-directory
> $1
>
>
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