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https://issues.apache.org/jira/browse/KAFKA-545?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jay Kreps updated KAFKA-545:
----------------------------
Attachment: KAFKA-545-draft.patch
Attaching wip that has this command. Usage is:
jkreps-mn:kafka-git jkreps$ ./bin/kafka-run-class.sh kafka.perf.LogPerformance
--help
Option Description
------ -----------
--batch-size <Integer: size> Number of messages to write in a
single batch. (default: 200)
--compression-codec <Integer: If set, messages are sent compressed
compression codec > (default: 0)
--date-format <date format> The date format to use for formatting
the time field. See java.text.
SimpleDateFormat for options.
(default: yyyy-MM-dd HH:mm:ss:SSS)
--dir <path> The log directory. (default:
/var/folders/wV/wVHRnnYrEX0ZFMG7ypsUXE+++TM/-
Tmp-/kafka-8193339)
--flush-interval <Integer: The number of messages in a partition
num_messages> between flushes. (default:
2147483647)
--flush-time <Integer: ms> The time between flushes. (default:
2147483647)
--help Print usage.
--hide-header If set, skips printing the header for
the stats
--index-interval <Integer: bytes> The number of bytes in between index
entries. (default: 4096)
--message-size <Integer: size> The size of each message. (default:
100)
--messages <Long: count> The number of messages to send or
consume (default:
9223372036854775807)
--partitions <Integer: num_partitions> The number of partitions. (default: 1)
--reader-batch-size <Integer: The number of messages to write at
num_messages> once. (default: 200)
--readers <Integer: num_threads> The number of reader threads.
(default: 1)
--reporting-interval <Integer: size> Interval at which to print progress
info. (default: 5000)
--show-detailed-stats If set, stats are reported for each
reporting interval as configured by
reporting-interval
--topic <topic> REQUIRED: The topic to consume from.
--writer-batch-size <Integer: The number of messages to write at
num_messages> once. (default: 200)
--writers <Integer: num_threads> The number of writer threads.
(default: 1)
> Add a Performance Suite for the Log subsystem
> ---------------------------------------------
>
> Key: KAFKA-545
> URL: https://issues.apache.org/jira/browse/KAFKA-545
> Project: Kafka
> Issue Type: New Feature
> Affects Versions: 0.8
> Reporter: Jay Kreps
> Priority: Blocker
> Labels: features
> Attachments: KAFKA-545-draft.patch
>
>
> We have had several performance concerns or potential improvements for the
> logging subsystem. To conduct these in a data-driven way, it would be good to
> have a single-machine performance test that isolated the performance of the
> log.
> The performance optimizations we would like to evaluate include
> - Special casing appends in a follower which already have the correct offset
> to avoid decompression and recompression
> - Memory mapping either all or some of the segment files to improve the
> performance of small appends and lookups
> - Supporting multiple data directories and avoiding RAID
> Having a standalone tool is nice to isolate the component and makes profiling
> more intelligible.
> This test would drive load against Log/LogManager controlled by a set of
> command line options. These command line program could then be scripted up
> into a suite of tests that covered variations in message size, message set
> size, compression, number of partitions, etc.
> Here is a proposed usage for the tool:
> ./bin/kafka-log-perf-test.sh
> Option Description
> ------ -----------
> --partitions The number of partitions to write to
> --dir The directory in which to write the log
> --message-size The size of the messages
> --set-size The number of messages per write
> --compression Compression alg
> --messages The number of messages to write
> --readers The number of reader threads reading the data
> The tool would capture latency and throughput for the append() and read()
> operations.
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