Copyright | (c) 2013-2021 Brendan Hay |
---|---|
License | Mozilla Public License, v. 2.0. |
Maintainer | Brendan Hay <brendan.g.hay+amazonka@gmail.com> |
Stability | auto-generated |
Portability | non-portable (GHC extensions) |
Safe Haskell | None |
Amazonka.Kinesis.SplitShard
Description
Splits a shard into two new shards in the Kinesis data stream, to
increase the stream's capacity to ingest and transport data.
SplitShard
is called when there is a need to increase the overall
capacity of a stream because of an expected increase in the volume of
data records being ingested.
You can also use SplitShard
when a shard appears to be approaching its
maximum utilization; for example, the producers sending data into the
specific shard are suddenly sending more than previously anticipated.
You can also call SplitShard
to increase stream capacity, so that more
Kinesis Data Streams applications can simultaneously read data from the
stream for real-time processing.
You must specify the shard to be split and the new hash key, which is the position in the shard where the shard gets split in two. In many cases, the new hash key might be the average of the beginning and ending hash key, but it can be any hash key value in the range being mapped into the shard. For more information, see Split a Shard in the Amazon Kinesis Data Streams Developer Guide.
You can use DescribeStream to determine the shard ID and hash key values
for the ShardToSplit
and NewStartingHashKey
parameters that are
specified in the SplitShard
request.
SplitShard
is an asynchronous operation. Upon receiving a SplitShard
request, Kinesis Data Streams immediately returns a response and sets
the stream status to UPDATING
. After the operation is completed,
Kinesis Data Streams sets the stream status to ACTIVE
. Read and write
operations continue to work while the stream is in the UPDATING
state.
You can use DescribeStream
to check the status of the stream, which is
returned in StreamStatus
. If the stream is in the ACTIVE
state, you
can call SplitShard
. If a stream is in CREATING
or UPDATING
or
DELETING
states, DescribeStream
returns a ResourceInUseException
.
If the specified stream does not exist, DescribeStream
returns a
ResourceNotFoundException
. If you try to create more shards than are
authorized for your account, you receive a LimitExceededException
.
For the default shard limit for an AWS account, see Kinesis Data Streams Limits in the Amazon Kinesis Data Streams Developer Guide. To increase this limit, contact AWS Support.
If you try to operate on too many streams simultaneously using
CreateStream, DeleteStream, MergeShards, and/or SplitShard, you receive
a LimitExceededException
.
SplitShard
has a limit of five transactions per second per account.
Synopsis
- data SplitShard = SplitShard' {}
- newSplitShard :: Text -> Text -> Text -> SplitShard
- splitShard_streamName :: Lens' SplitShard Text
- splitShard_shardToSplit :: Lens' SplitShard Text
- splitShard_newStartingHashKey :: Lens' SplitShard Text
- data SplitShardResponse = SplitShardResponse' {
- newSplitShardResponse :: SplitShardResponse
Creating a Request
data SplitShard Source #
Represents the input for SplitShard
.
See: newSplitShard
smart constructor.
Constructors
SplitShard' | |
Fields
|
Instances
Arguments
:: Text | |
-> Text | |
-> Text | |
-> SplitShard |
Create a value of SplitShard
with all optional fields omitted.
Use generic-lens or optics to modify other optional fields.
The following record fields are available, with the corresponding lenses provided for backwards compatibility:
$sel:streamName:SplitShard'
, splitShard_streamName
- The name of the stream for the shard split.
$sel:shardToSplit:SplitShard'
, splitShard_shardToSplit
- The shard ID of the shard to split.
$sel:newStartingHashKey':SplitShard'
, splitShard_newStartingHashKey
- A hash key value for the starting hash key of one of the child shards
created by the split. The hash key range for a given shard constitutes a
set of ordered contiguous positive integers. The value for
NewStartingHashKey
must be in the range of hash keys being mapped into
the shard. The NewStartingHashKey
hash key value and all higher hash
key values in hash key range are distributed to one of the child shards.
All the lower hash key values in the range are distributed to the other
child shard.
Request Lenses
splitShard_streamName :: Lens' SplitShard Text Source #
The name of the stream for the shard split.
splitShard_shardToSplit :: Lens' SplitShard Text Source #
The shard ID of the shard to split.
splitShard_newStartingHashKey :: Lens' SplitShard Text Source #
A hash key value for the starting hash key of one of the child shards
created by the split. The hash key range for a given shard constitutes a
set of ordered contiguous positive integers. The value for
NewStartingHashKey
must be in the range of hash keys being mapped into
the shard. The NewStartingHashKey
hash key value and all higher hash
key values in hash key range are distributed to one of the child shards.
All the lower hash key values in the range are distributed to the other
child shard.
Destructuring the Response
data SplitShardResponse Source #
See: newSplitShardResponse
smart constructor.
Constructors
SplitShardResponse' | |
Instances
Eq SplitShardResponse Source # | |
Defined in Amazonka.Kinesis.SplitShard Methods (==) :: SplitShardResponse -> SplitShardResponse -> Bool # (/=) :: SplitShardResponse -> SplitShardResponse -> Bool # | |
Read SplitShardResponse Source # | |
Defined in Amazonka.Kinesis.SplitShard Methods readsPrec :: Int -> ReadS SplitShardResponse # readList :: ReadS [SplitShardResponse] # | |
Show SplitShardResponse Source # | |
Defined in Amazonka.Kinesis.SplitShard Methods showsPrec :: Int -> SplitShardResponse -> ShowS # show :: SplitShardResponse -> String # showList :: [SplitShardResponse] -> ShowS # | |
Generic SplitShardResponse Source # | |
Defined in Amazonka.Kinesis.SplitShard Associated Types type Rep SplitShardResponse :: Type -> Type # Methods from :: SplitShardResponse -> Rep SplitShardResponse x # to :: Rep SplitShardResponse x -> SplitShardResponse # | |
NFData SplitShardResponse Source # | |
Defined in Amazonka.Kinesis.SplitShard Methods rnf :: SplitShardResponse -> () # | |
type Rep SplitShardResponse Source # | |
newSplitShardResponse :: SplitShardResponse Source #
Create a value of SplitShardResponse
with all optional fields omitted.
Use generic-lens or optics to modify other optional fields.