Migration Guide¶
Migrating to Rally 2.0.1¶
Pipelines from-sources-complete and from-sources-skip-build are deprecated¶
Rally 2.0.1 caches source artifacts automatically in ~/.rally/benchmarks/distributions/src
. Therefore, it is not necessary anymore to explicitly skip the build with --pipeline=from-sources-skip-build
. Specify --pipeline=from-sources
instead. See the pipeline reference documentation for more details.
wait-for-recovery requires an index
parameter¶
Previously, the wait-for-recovery
operation checked all indices but with Rally 2.0.1 an index
parameter is required and only that index (or index pattern) is checked.
Migrating to Rally 2.0.0¶
Minimum Python version is 3.8.0¶
Rally 2.0.0 requires Python 3.8.0. Check the updated installation instructions for more details.
JAVA_HOME and the bundled runtime JDK¶
Rally can optionally use the bundled runtime JDK by setting --runtime-jdk="bundled"
. This setting will use the JDK that is bundled with
Elasticsearch and not honor any JAVA_HOME
settings you may have set.
Meta-Data for queries are omitted¶
Rally 2.0.0 does not determine query meta-data anymore by default to reduce the risk of client-side bottlenecks. The following meta-data fields are affected:
hits
hits_relation
timed_out
took
If you still want to retrieve them (risking skewed results due to additional overhead), set the new property detailed-results
to true
for any operation of type search
.
Runner API uses asyncio¶
In order to support more concurrent clients in the future, Rally is moving from a synchronous model to an asynchronous model internally. With Rally 2.0.0 all custom runners need to be implemented using async APIs and a new bool argument async_runner=True
needs to be provided upon registration. Below is an example how to migrate a custom runner function.
A custom runner prior to Rally 2.0.0:
def percolate(es, params):
es.percolate(
index="queries",
doc_type="content",
body=params["body"]
)
def register(registry):
registry.register_runner("percolate", percolate)
With Rally 2.0.0, the implementation changes as follows:
async def percolate(es, params):
await es.percolate(
index="queries",
doc_type="content",
body=params["body"]
)
def register(registry):
registry.register_runner("percolate", percolate, async_runner=True)
Apply to the following changes for each custom runner:
- Prefix the function signature with
async
. - Add an
await
keyword before each Elasticsearch API call. - Add
async_runner=True
as the last argument to theregister_runner
function.
For more details please refer to the updated documentation on custom runners.
trial-id
and trial-timestamp
are removed¶
Since Rally 1.4.0, Rally uses the properties race-id
and race-timestamp
when writing data to the Elasticsearch metrics store. The properties trial-id
and trial-timestamp
were populated but are removed in this release. Any visualizations that still rely on these properties need to be changed to the new ones.
Migrating to Rally 1.4.1¶
Document IDs are now padded with 0 instead of spaces¶
When Rally 1.4.1 generates document IDs, it will pad them with ‘0’ instead of ‘ ‘ - 0000000000 instead of ‘ 0’, etc. Elasticsearch has optimizations for numeric IDs, so observed performance in Elasticsearch should improve slightly.
Migrating to Rally 1.4.0¶
cluster-settings is deprecated in favor of the put-settings operation¶
Before Rally 1.4.0, cluster settings could be specified on the track with the cluster-settings
property. This functionality is deprecated and you should set dynamic cluster settings via the new put-settings
runner. Static settings should instead be set via --car-params
.
Build logs are stored in Rally’s log directory¶
If you benchmark source builds of Elasticsearch, Rally has previously stored the build output log in a race-specific directory. With this release, Rally will store the most recent build log in /home/user/.rally/logs/build.log
.
Index size and Total Written are not included in the command line report¶
Elasticsearch nodes are now managed independently of benchmark execution and thus all system metrics (“index size” and “total written”) may be determined after the command line report has been written. The corresponding metrics (final_index_size_bytes
and disk_io_write_bytes
) are still written to the Elasticsearch metrics store if one is configured.
Node details are omitted from race metadata¶
Before Rally 1.4.0, the file race.json
contained node details (such as the number of cluster nodes or details about the nodes’ operating system version) if Rally provisioned the cluster. With this release, this information is now omitted. This change also applies to the indices rally-races*
in case you have setup an Elasticsearch metrics store. We recommend to use user tags in case such information is important, e.g. for visualising results.
trial-id
and trial-timestamp
are deprecated¶
With Rally 1.4.0, Rally will use the properties race-id
and race-timestamp
when writing data to the Elasticsearch metrics store. The properties trial-id
and trial-timestamp
are still populated but will be removed in a future release. Any visualizations that rely on these properties should be changed to the new ones.
Custom Parameter Sources¶
With Rally 1.4.0, we have changed the API for custom parameter sources. The size()
method is now deprecated and is instead replaced with a new property called infinite
. If you have previously returned None
in size()
, infinite
should be set to True
, otherwise False
. Also, we recommend to implement the property percent_completed
as Rally might not be able to determine progress in some cases. See below for some examples.
Old:
class CustomFiniteParamSource:
# ...
def size():
return calculate_size()
def params():
return next_parameters()
class CustomInfiniteParamSource:
# ...
def size():
return None
# ...
New:
class CustomFiniteParamSource:
def __init__(self, track, params, **kwargs):
self.infinite = False
# to track progress
self.current_invocation = 0
# ...
# Note that we have removed the size() method
def params():
self.current_invocation += 1
return next_parameters()
# Implementing this is optional but recommended for proper progress reports
@property
def percent_completed(self):
# for demonstration purposes we use calculate_size() here
# to determine the expected number of invocations. However, if
# it is possible to determine this value upfront, it is best
# to cache it in a field and just reuse the value
return self.current_invocation / calculate_size()
class CustomInfiniteParamSource:
def __init__(self, track, params, **kwargs):
self.infinite = True
# ...
# ...
# Note that we have removed the size() method
# ...
Migrating to Rally 1.3.0¶
Races now stored by ID instead of timestamp¶
With Rally 1.3.0, Races will be stored by their Trial ID instead of their timestamp.
This means that on disk, a given race will be found at benchmarks/races/62d1e928-48b0-4d07-9899-07b45d031566/
instead of benchmarks/races/2019-07-03-17-52-07
Laps feature removed¶
The --laps
parameter and corresponding multi-run trial functionality has been removed from execution and reporting.
If you need lap functionality, the following shell script can be used instead:
RALLY_LAPS=3
for lap in $(seq 1 ${RALLY_LAPS})
do
esrally --pipeline=benchmark-only --user-tag lap:$lap
done
Migrating to Rally 1.2.1¶
CPU usage is not measured anymore¶
With Rally 1.2.1, CPU usage will neither be measured nor reported. We suggest to use system monitoring tools like mpstat
, sar
or Metricbeat to measure CPU usage instead.
Migrating to Rally 1.1.0¶
request-params
in operations are passed as is and not serialized¶
With Rally 1.1.0 any operations supporting the optional request-params
property will pass the structure as is without attempting to serialize values.
Until now, request-params
relied on parameters being supported by the Elasticsearch Python client API calls. This means that for example boolean type parameters
should be specified as strings i.e. "true"
or "false"
rather than true/false
.
Example
Using create-index
before 1.1.0
:
{
"name": "create-all-indices",
"operation-type": "create-index",
"settings": {
"index.number_of_shards": 1
},
"request-params": {
"wait_for_active_shards": true
}
}
Using create-index
starting with 1.1.0
:
{
"name": "create-all-indices",
"operation-type": "create-index",
"settings": {
"index.number_of_shards": 1
},
"request-params": {
"wait_for_active_shards": "true"
}
}
Migrating to Rally 1.0.1¶
Logs are not rotated¶
With Rally 1.0.1 we have disabled automatic rotation of logs by default because it can lead to race conditions due to Rally’s multi-process architecture. If you did not change the default out-of-the-box logging configuration, Rally will automatically fix your configuration. Otherwise, you need to replace all instances of logging.handlers.TimedRotatingFileHandler
with logging.handlers.WatchedFileHandler
to disable log rotation.
To rotate logs we recommend to use external tools like logrotate. See the following example as a starting point for your own logrotate
configuration and ensure to replace the path /home/user/.rally/logs/rally.log
with the proper one:
/home/user/.rally/logs/rally.log {
# rotate daily
daily
# keep the last seven log files
rotate 7
# remove logs older than 14 days
maxage 14
# compress old logs ...
compress
# ... after moving them
delaycompress
# ignore missing log files
missingok
# don't attempt to rotate empty ones
notifempty
}
Migrating to Rally 1.0.0¶
Handling of JDK versions¶
Previously the path to the JDK needed to be configured in Rally’s configuration file (~/.rally/rally.ini
) but this is too inflexible given the increased JDK release cadence. In order to keep up, we define now the allowed runtime JDKs in rally-teams per Elasticsearch version.
To resolve the path to the appropriate JDK you need to define the environment variable JAVA_HOME
on each targeted machine.
You can also set version-specific environment variables, e.g. JAVA7_HOME
, JAVA8_HOME
or JAVA10_HOME
which will take precedence over JAVA_HOME
.
Note
Rally will choose the highest appropriate JDK per Elasticsearch version. You can use --runtime-jdk
to force a specific JDK version but the path will still be resolved according to the logic above.
Custom Parameter Sources¶
In Rally 0.10.0 we have deprecated some parameter names in custom parameter sources. In Rally 1.0.0, these deprecated names have been removed. Therefore you need to replace the following parameter names if you use them in custom parameter sources:
Operation type | Old name | New name |
---|---|---|
search | use_request_cache | cache |
search | request_params | request-params |
search | items_per_page | results-per-page |
bulk | action_metadata_present | action-metadata-present |
force-merge | max_num_segments | max-num-segments |
In Rally 0.9.0 the signature of custom parameter sources has also changed. In Rally 1.0.0 we have removed the backwards compatibility layer so you need to change the signatures.
Old:
# for parameter sources implemented as functions
def custom_param_source(indices, params):
# for parameter sources implemented as classes
class CustomParamSource:
def __init__(self, indices, params):
New:
# for parameter sources implemented as functions
def custom_param_source(track, params, **kwargs):
# for parameter sources implemented as classes
class CustomParamSource:
def __init__(self, track, params, **kwargs):
You can use the property track.indices
to access indices.
Migrating to Rally 0.11.0¶
Versioned teams¶
Note
You can skip this section if you do not create custom Rally teams.
We have introduced versioned team specifications and consequently the directory structure changes. All cars and plugins need to reside in a version-specific subdirectory now. Up to now the structure of a team repository was as follows:
.
├── cars
│ ├── 1gheap.ini
│ ├── 2gheap.ini
│ ├── defaults.ini
│ ├── ea
│ │ └── config
│ │ └── jvm.options
│ ├── ea.ini
│ └── vanilla
│ └── config
│ ├── elasticsearch.yml
│ ├── jvm.options
│ └── log4j2.properties
└── plugins
├── core-plugins.txt
└── transport_nio
├── default
│ └── config
│ └── elasticsearch.yml
└── transport.ini
Starting with Rally 0.11.0, Rally will look for a directory “v1” within cars
and plugins
. The files that should be copied to the Elasticsearch directory, need to be contained in a templates
subdirectory. Therefore, the new structure is as follows:
.
├── cars
│ └── v1
│ ├── 1gheap.ini
│ ├── 2gheap.ini
│ ├── defaults.ini
│ ├── ea
│ │ └── templates
│ │ └── config
│ │ └── jvm.options
│ ├── ea.ini
│ └── vanilla
│ └── templates
│ └── config
│ ├── elasticsearch.yml
│ ├── jvm.options
│ └── log4j2.properties
└── plugins
└── v1
├── core-plugins.txt
└── transport_nio
├── default
│ └── templates
│ └── config
│ └── elasticsearch.yml
└── transport.ini
It is also required that you create a file variables.ini
for all your car config bases (optional for mixins). Therefore, the full directory structure is:
.
├── cars
│ └── v1
│ ├── 1gheap.ini
│ ├── 2gheap.ini
│ ├── defaults.ini
│ ├── ea
│ │ └── templates
│ │ └── config
│ │ └── jvm.options
│ ├── ea.ini
│ └── vanilla
│ ├── config.ini
│ └── templates
│ └── config
│ ├── elasticsearch.yml
│ ├── jvm.options
│ └── log4j2.properties
└── plugins
└── v1
├── core-plugins.txt
└── transport_nio
├── default
│ └── templates
│ └── config
│ └── elasticsearch.yml
└── transport.ini
For distribution-based builds, config.ini
file needs to contain a section variables
and a release_url
property:
[variables]
release_url=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-oss-{{VERSION}}.tar.gz
Migrating to Rally 0.10.0¶
Removal of auto-detection and dependency on Gradle¶
We have removed the auto-detection and dependency on Gradle, required until now to build from source, in favor of the Gradle Wrapper which is present in the Elasticsearch repository for all branches >= 5.0.0.
Use full build command in plugin configuration¶
With Rally 0.10.0 we have removed the property build.task
for plugin definitions, in the source
section of the Rally configuration file.
Instead, a new property build.command
has been introduced where the full build command needs to be supplied.
The earlier syntax, to build a hypothetical plugin called my-plugin
alongside Elasticsearch, required:
plugin.my-plugin.build.task = :my-plugin:plugin:assemble
This needs to be changed to the full command:
plugin.my-plugin.build.command = ./gradlew :my-plugin:plugin:assemble
Note that if you are configuring Plugins based on a released Elasticsearch version the command specified in build.command
will be executed from the plugins root directory. It’s likely this directory won’t have the Gradle Wrapper so you’ll need to specify the full path to a Gradle command e.g.:
plugin.my-plugin.build.command = /usr/local/bin/gradle :my-plugin:plugin:assemble
Check Building plugins from sources for more information.
Removal of operation type index
¶
We have removed the operation type index
which has been deprecated with Rally 0.8.0. Use bulk
instead as operation type.
Removal of the command line parameter --cluster-health
¶
We have removed the command line parameter --cluster-health
which has been deprecated with Rally 0.8.0. When using Rally’s standard tracks, specify the expected cluster health as a track parameter instead, e.g.: --track-params="cluster_health:'yellow'"
.
Removal of index-automanagement¶
We have removed the possibility that Rally automatically deletes and creates indices. Therefore, you need to add the following definitions explicitly at the beginning of a schedule if you want Rally to create declared indices:
"schedule": [
{
"operation": "delete-index"
},
{
"operation": {
"operation-type": "create-index",
"settings": {
"index.number_of_replicas": 0
}
}
},
{
"operation": {
"operation-type": "cluster-health",
"request-params": {
"wait_for_status": "green"
}
}
}
The example above also shows how to provide per-challenge index settings. If per-challenge index settings are not required, you can just specify them in the index definition file.
This behavior applies similarly to index templates as well.
Custom Parameter Sources¶
We have aligned the internal names between parameter sources and runners with the ones that are specified by the user in the track file. If you have implemented custom parameter sources or runners, adjust the parameter names as follows:
Operation type | Old name | New name |
---|---|---|
search | use_request_cache | cache |
search | request_params | request-params |
search | items_per_page | results-per-page |
bulk | action_metadata_present | action-metadata-present |
force-merge | max_num_segments | max-num-segments |
Migrating to Rally 0.9.0¶
Track Syntax¶
With Rally 0.9.0, we have changed the track file format. While the previous format is still supported with deprecation warnings, we recommend that you adapt your tracks as we will remove the deprecated syntax with the next minor release.
Below is an example of a track with the previous syntax:
{
"description": "Tutorial benchmark for Rally",
"data-url": "http://benchmarks.elasticsearch.org.s3.amazonaws.com/corpora/geonames",
"indices": [
{
"name": "geonames",
"types": [
{
"name": "type",
"mapping": "mappings.json",
"documents": "documents.json",
"document-count": 8647880,
"uncompressed-bytes": 2790927196
}
]
}
],
"challenge": {
"name": "index-only",
"index-settings": {
"index.number_of_replicas": 0
},
"schedule": [
{
"operation": {
"operation-type": "bulk",
"bulk-size": 5000
},
"warmup-time-period": 120,
"clients": 8
}
]
}
}
Before Rally 0.9.0, indices have been created implicitly. We will remove this ability and thus you need to tell Rally explicitly that you want to create indices. With Rally 0.9.0 your track should look as follows:
{
"description": "Tutorial benchmark for Rally",
"indices": [
{
"name": "geonames",
"body": "index.json",
"auto-managed": false,
"types": [ "type" ]
}
],
"corpora": [
{
"name": "geonames",
"documents": [
{
"base-url": "http://benchmarks.elasticsearch.org.s3.amazonaws.com/corpora/geonames",
"source-file": "documents.json",
"document-count": 8647880,
"uncompressed-bytes": 2790927196
}
]
}
],
"challenge": {
"name": "index-only",
"schedule": [
{
"operation": "delete-index"
},
{
"operation": {
"operation-type": "create-index",
"settings": {
"index.number_of_replicas": 0
}
}
},
{
"operation": {
"operation-type": "cluster-health",
"request-params": {
"wait_for_status": "green"
}
}
},
{
"operation": {
"operation-type": "bulk",
"bulk-size": 5000
},
"warmup-time-period": 120,
"clients": 8
}
]
}
}
Let’s go through the necessary changes one by one.
Define the document corpus separately¶
Previously you had to define the document corpus together with the document type. In order to allow you to reuse existing document corpora across tracks, you now need to specify any document corpora separately:
"corpora": [
{
"name": "geonames",
"documents": [
{
"base-url": "http://benchmarks.elasticsearch.org.s3.amazonaws.com/corpora/geonames",
"source-file": "documents.json",
"document-count": 8647880,
"uncompressed-bytes": 2790927196
}
]
}
]
Note that this is just a simple example that should cover the most basic case. Be sure to check the track reference for all details.
Change the index definition¶
The new index definition now looks as follows:
{
"name": "geonames",
"body": "index.json",
"auto-managed": false,
"types": [ "type" ]
}
We have added a body
property to the index and removed the mapping
property from the type. In fact, the only information that we need about the document type is its name, hence it is now a simple list of strings. Just put all type mappings now into the mappings
property of the index definition; see also the create index API documentation.
Secondly, we have disabled index auto-management by setting auto-managed
to false
. This allows us to define explicit tasks below to manage our index. Note that index auto-management is still working in Rally 0.9.0 but it will be removed with the next minor release Rally 0.10.0.
Explicitly delete and recreate the index¶
We have also added three tasks at the beginning of the schedule:
{
"operation": "delete-index"
},
{
"operation": {
"operation-type": "create-index",
"settings": {
"index.number_of_replicas": 0
}
}
},
{
"operation": {
"operation-type": "cluster-health",
"request-params": {
"wait_for_status": "green"
}
}
}
These tasks represent what Rally previously did implicitly.
The first task will delete all indices that have been declared in the indices
section if they existed previously. This ensures that we don’t have any leftovers from previous benchmarks.
After that we will create all indices that have been declared in the indices
section. Note that we have also removed the special property index-settings
and moved it to the settings
parameter of create-index
. Rally will merge any settings from the index body definition with these settings. This means you should define settings that are always the same in the index body and settings that change from challenge to challenge in the settings
property.
Finally, Rally will check that the cluster health is green. If you want to be able to override the cluster health check parameters from the command line, you can leverage Rally’s track parameter feature:
{
"operation": {
"operation-type": "cluster-health",
"request-params": {
"wait_for_status": "{{ cluster_health|default('green') }}"
}
}
}
If you don’t specify anything on the command line, Rally will use the default value but you can e.g. specify --track-params="cluster_health:'yellow'"
so Rally will check for (at least) a yellow cluster health status.
Note that you can customize these operations.
Custom Parameter Sources¶
With Rally 0.9.0, the API for custom parameter sources has changed. Previously, the following syntax was valid:
# for parameter sources implemented as functions
def custom_param_source(indices, params):
# for parameter sources implemented as classes
class CustomParamSource:
def __init__(self, indices, params):
With Rally 0.9.0, the signatures need to be changed to:
# for parameter sources implemented as functions
def custom_param_source(track, params, **kwargs):
# for parameter sources implemented as classes
class CustomParamSource:
def __init__(self, track, params, **kwargs):
Rally will issue a warning along the lines of Parameter source 'custom_param_source' is using deprecated method signature
if your track is affected. If you need access to the indices
list, you can call track.indices
to retrieve it from the track.