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229 Commits

Author SHA1 Message Date
Aliaksandr Valialkin
7d7fbf890e app/{vmbackup,vmrestore}: add vmbackup and vmrestore tools for creating backups on s3 or gcs from instant snapshots 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/203
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/38
 2019-11-07 21:26:43 +02:00
Aliaksandr Valialkin
1c777e0245 lib/storage: substitute error message about unsorted items in the index block after metricIDs merge with counter 
The origin of the error has been detected and documented in the code,
so it is enough to export a counter for such errors at `vm_index_blocks_with_metric_ids_incorrect_order_total`,
so it could be monitored and alerted on high error rates.

Export also the counter for processed index blocks with metricIDs - `vm_index_blocks_with_metric_ids_processed_total`,
so its' rate could be compared to `rate(vm_index_blocks_with_metric_ids_incorrect_order_total)`.
 2019-11-06 14:32:41 +02:00
Aliaksandr Valialkin
4a8251feff app/vmselect/promql: add lag(q[d]) function, which returns the lag between the current timestamp and the timstamp for the last data point in q 2019-11-01 12:21:43 +02:00
Aliaksandr Valialkin
6ab9c98a1e app/vmstorage: add -bigMergeConcurrency and -smallMergeConcurrency flags for tuning the maximum number of CPU cores used during merges 2019-10-31 16:17:29 +02:00
Aliaksandr Valialkin
4e6bf6f538 app/vmselect: add -search.latencyOffset flag for tuning the time after data collection when data points become visible in query results 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/218
 2019-10-28 12:32:36 +02:00
Aliaksandr Valialkin
78fc35c9b1 all: make fmt 2019-10-17 20:05:12 +03:00
Aliaksandr Valialkin
5b01b7fb01 all: add support for GOARCH=386 and fix all the issues related to 32-bit architectures such as GOARCH=arm 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/212
 2019-10-17 18:27:49 +03:00
Aliaksandr Valialkin
99786c2864 app/vmselect/prometheus: add -search.maxLookback command-line flag for overriding dynamic calculations for max lookback interval 
This flag is similar to `-search.lookback-delta` if set. The max lookback interval is determined dynamically
from interval between datapoints for each input time series if the flag isn't set.

The interval can be overriden on per-query basis by passing `max_lookback=<duration>` query arg to `/api/v1/query` and `/api/v1/query_range`.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/209
 2019-10-15 21:37:17 +03:00
Aliaksandr Valialkin
a5302a6651 app/vmselect/promql: take into account the previous point when calculating max_over_time and min_over_time 
This lines up with `first_over_time` function used in `rollup_candlestick`, so `rollup=low` always returns
the minimum value.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/204
 2019-10-08 12:30:16 +03:00
Aliaksandr Valialkin
483af3a97a app/vmselect/netstorage: hint the OS that tmpBlocksFile is read almost sequentially 
This became the case after b7ee2e7af2 .
 2019-09-30 00:13:33 +03:00
Aliaksandr Valialkin
946ca438a6 app/vmselect/netstorage: marshal block outside tmpBlocksFile.WriteBlock 
This also allows marshaling outside lock, thus reducing the amount of work under the lock.
 2019-09-28 20:57:20 +03:00
Aliaksandr Valialkin
e92e39eddf app/vmselect/netstorage: reduce the number of disk seeks when the query processes big number of time series 2019-09-28 20:57:20 +03:00
Aliaksandr Valialkin
56dff57f77 app/vmselect/netstorage: reduce memory usage when fetching big number of data blocks from vmstorage 
Dump data blocks directly to temporary file instead of buffering them in RAM
 2019-09-28 12:21:57 +03:00
Aliaksandr Valialkin
ba460f62e6 app/vmselect/promql: do not generate timestamps for NaN values in timestamp function according to Prometheus logic 2019-09-27 18:55:16 +03:00
Aliaksandr Valialkin
bd1cf053f6 app/vmselect/promql: add increases_over_time and decreases_over_time functions 
`increases_over_time(q[d])` returns the number of `q` increases during the given duration `d`.
`decreases_over_time(q[d])` returns the number of `q` decreases during the given duration `d`.
 2019-09-25 20:38:51 +03:00
Aliaksandr Valialkin
8d398af92f app/vminsert/netstorage: mention the data size that cannot be sent to vmstorage 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/175
 2019-09-25 12:53:41 +03:00
Aliaksandr Valialkin
73ac7b8dd6 app/vminsert/netstorage: make sure the conn exists before closing it in storageNode.closeBrokenConn 
The conn can be missing or already closed during the call to storageNode.closeBrokenConn.
Prevent `nil pointer dereference` panic by verifying whether the conn is already closed.

Thanks to @CH-anhngo for reporting the issue.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/189
 2019-09-25 10:36:50 +03:00
Aliaksandr Valialkin
b0c738ae8b app/vminsert/opentsdbhttp: remove FATAL prefix from logger.Fatalf errors for the sake of consistency with other logger.Fatalf calls 2019-09-19 22:16:11 +03:00
Aliaksandr Valialkin
550a12415a app/vminsert/netstorage: log network errors when sending data to vmstorage nodes 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/175
 2019-09-13 22:26:24 +03:00
Aliaksandr Valialkin
ee4585db33 app/vmselect/promql: properly handle subqueries like aggr_func(rollup_func(metric[window:step])) 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/184
 2019-09-13 21:42:11 +03:00
Aliaksandr Valialkin
828e5f6d26 app/vmselect/promql: binary operation fixes according to Prometheus behaviour 
The follosing issues were fixed:
- VictoriaMetrics could leave superflouos labels when using `on` or `ignoring` modifiers
- VictoriaMetrics could return `duplicate timeseries` error when using `group_left` or `group_right` with non-empty label list
 2019-09-13 17:43:09 +03:00
Aliaksandr Valialkin
ed50b8792b app/vminsert/netstorage: reduce the maximum buffer size for rerouted rows, so it occupies less RAM 2019-09-11 14:50:30 +03:00
Aliaksandr Valialkin
b101064f8b all: report the number of bytes read on io.ReadFull error 
This should simplify error investigation similar to https://github.com/VictoriaMetrics/VictoriaMetrics/issues/175
 2019-09-11 14:50:24 +03:00
Aliaksandr Valialkin
2f4c950fe9 app/vminsert/netstorage: send per-storageNode bufs to vmstorage nodes in parallel 
This should improve the maximum ingestion throughput.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/175
 2019-09-11 14:50:19 +03:00
Aliaksandr Valialkin
694cc59ed1 app/vminsert/netstorage: dynamically adjust timeouts for sending packets from vminsert to vmstorage depending on packet size 
Bigger packets will have more chances to be sent to vmstorage.
 2019-09-11 14:50:14 +03:00
Aliaksandr Valialkin
2c654258ef lib/fs: add MustStopDirRemover for waiting until pending directories are removed on graceful shutdown 
This patch is mainly required for laggy NFS. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/162
 2019-09-05 11:17:17 +03:00
Aliaksandr Valialkin
d0953e9f02 app/vmselect/promql: ignore grouping by destination label in count_values, since such a grouping is performed automatically 2019-09-04 19:59:02 +03:00
Aliaksandr Valialkin
f78ffe565f app/vmselect/promql: do not return artificial points beyond the last point in time series 2019-09-04 16:34:29 +03:00
Aliaksandr Valialkin
a7d5d611fe app/vmselect/prometheus: do not adjust start and end args in /api/v1/query_range if nocache=1 arg is set 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/171
 2019-09-04 13:10:17 +03:00
Aliaksandr Valialkin
b08f085082 app/vmselect/promql: reset timeseries name on group_left and group_right as Prometheus does 2019-09-03 20:43:29 +03:00
Aliaksandr Valialkin
458d412bb6 app/vmselect/netstorage: adaptively adjust the maximum inmemory file size for storing temporary blocks 
The maximum inmemory file size now depends on `-memory.allowedPercent`.
This should improve performance and reduce the number of filesystem calls
on machines with big amounts of RAM when performing heavy queries
over big number of samples and time series.
 2019-09-03 13:32:18 +03:00
Aliaksandr Valialkin
604a4312f9 all: port to FreeBSD on GOARCH=amd64 2019-08-28 01:46:09 +03:00
Aliaksandr Valialkin
5893a9f9a3 app/vmstorage: increase default values for search.maxTagKeys, search.maxTagValues and search.maxUniqueTimeseries 2019-08-27 14:28:26 +03:00
Aliaksandr Valialkin
38711526d3 app/vminsert/influx: set db label only if Influx line doesnt have db tag 2019-08-24 13:55:01 +03:00
Aliaksandr Valialkin
1ee536f9fd app/vminsert: skip empty tags 2019-08-24 13:36:41 +03:00
Aliaksandr Valialkin
a283023d16 app/vminsert/opentsdbhttp: skip invalid rows and continue parsing the remaining rows 
Invalid rows are logged and counted in `vm_rows_invalid_total{type="opentsdb-http"}` metric
 2019-08-24 13:36:41 +03:00
Aliaksandr Valialkin
38b9615c53 app/vminsert/opentsdb: skip invalid rows and continue parsing the remaining rows 
Invalid rows are logged and counted in `vm_rows_invalid_total{type="opentsdb"}` metric
 2019-08-24 13:36:41 +03:00
Aliaksandr Valialkin
2a8fc41bab app/vminsert/graphite: skip invalid rows and continue parsing the remaining rows 
Invalid rows are logged and counted in `vm_rows_invalid_total{type="graphite"}` metric
 2019-08-24 13:36:41 +03:00
Aliaksandr Valialkin
22685ef94d app/vminsert/influx: skip invalid rows and continue parsing the remaining rows 
Invalid influx lines are logged and counted in `vm_rows_invalid_total{type="influx"}` metric.
 2019-08-24 13:36:41 +03:00
Aliaksandr Valialkin
425a81a6c7 app/vminsert/influx: do not allow escaping newline char, since they dont occur in real life 
The prefious report with escaped newline chars in influx line protocol was false alarm.
 2019-08-23 18:43:00 +03:00
Aliaksandr Valialkin
8da8dd0876 app/vminsert/opentsdbhttp: allow timestamp as float64 and as string, since it occurs in real life 2019-08-23 18:35:52 +03:00
Aliaksandr Valialkin
0ea21eb9dc app/vminsert/influx: handle \r\n aka crlf influx line endings from windows world 
Such lines exist in real life.
 2019-08-23 18:28:54 +03:00
Aliaksandr Valialkin
b3502b2b39 app/vminsert/influx: allow escaping newline char 
Though newline char isn't mentioned in escape rules at https://docs.influxdata.com/influxdb/v1.7/write_protocols/line_protocol_tutorial/ ,
there are reports that such chars occur in real life
 2019-08-23 15:14:58 +03:00
Aliaksandr Valialkin
f1f8fce4f7 app/vminsert/influx: skip comments starting with # in influx line protocol 2019-08-23 14:43:24 +03:00
Aliaksandr Valialkin
697de90893 app/vminsert: do not drop data in reroutedBuf if all the storage nodes are unhealthy 2019-08-23 10:38:19 +03:00
Aliaksandr Valialkin
a5dc54efc3 app/vminsert: properly limit the size of reroutedBuf 2019-08-23 10:29:51 +03:00
Aliaksandr Valialkin
c197641978 all: return 503 http error if service is temporarily unavailable 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/156
 2019-08-23 09:49:50 +03:00
Aliaksandr Valialkin
e734076f0f app/vminsert: allow setting the maximum number of labels per time series via -maxLabelsPerTimeseries 2019-08-23 08:47:18 +03:00
Aliaksandr Valialkin
e9db22a551 app/vmselect/promql: attempt to repair invalid bucket counts passed to histogram_quantile 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/136
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/154
 2019-08-22 14:39:24 +03:00
Aliaksandr Valialkin
0697164b4f app/vminsert: add ability to ingest data via HTTP OpenTSDB /api/put requests 
This is manual merge of the https://github.com/VictoriaMetrics/VictoriaMetrics/pull/152
Thanks to nustinov@gmail.com for the initial pull request.
 2019-08-22 12:46:54 +03:00
Aliaksandr Valialkin
4d555c7c87 app/vminsert/opentsdb: fix BenchmarkRowsUnmarshal by adding missing put prefixes to each line 2019-08-21 19:15:04 +03:00
Aliaksandr Valialkin
90a4b00b10 app/vmselect/promql: fix panic on -search.disableCache 
Reset the cache if it is disabled instead of stopping, since it is stopped on graceful shutdown.
 2019-08-21 17:12:01 +03:00
Aliaksandr Valialkin
491b1762c8 app/vmselect/promql: explain why empty timeseries arent removed in transformLabelValue 2019-08-21 11:29:41 +03:00
Aliaksandr Valialkin
db1de4277c app/vmselect/promql: remove NaNs from /api/v1/query_range output like Prometheus does 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/153
 2019-08-20 23:01:59 +03:00
Aliaksandr Valialkin
99331606e1 app/vmselect/promql: pre-allocate memory for map for checking for duplicate timeseries 
This should reduce memory allocations for big number of timeseries
 2019-08-20 23:01:57 +03:00
Aliaksandr Valialkin
1101765adb app/vmselect/promql: add label_value(q, label_name) func, which returns numeric value labels with name label_name in q 2019-08-20 00:28:44 +03:00
Aliaksandr Valialkin
940349ccb9 app/vmselect/promql: independently track offset hints for tStart and tEnd 
This should improve performance if timeseries starts or ends on the selected time range
 2019-08-19 13:40:24 +03:00
Aliaksandr Valialkin
6ae4b4190f app/vmselect/promql: optimize search for timestamp boundaries in rollupConfig.Do 
This should improve the performance of queries over big number of time series
with big number of output points.
 2019-08-19 13:03:38 +03:00
Aliaksandr Valialkin
005aabd305 app/vmselect/promql: add scrape_interval(q[d]) function, which would return scrape interval for q over d 2019-08-18 21:08:15 +03:00
Aliaksandr Valialkin
218cb4623a app/vmselect/promql: hande comparisons with NaN similar to Prometheus 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/150
 2019-08-18 00:25:58 +03:00
Aliaksandr Valialkin
dcce92c63c app/vmselect/promql: add lifetime(q[d]) function, which returns the lifetime of q over d in seconds. 
This function is useful for determining time series lifetime.
`d` must exceed the expected lifetime of the time series, otherwise
the function would return values close to `d`.
 2019-08-16 11:59:51 +03:00
Aliaksandr Valialkin
0cb66a8f95 app/vmselect/promql: fix corner-case calculation for ideriv 2019-08-16 11:59:50 +03:00
Aliaksandr Valialkin
1b5b9ced27 app/vmselect/promql: properly handle corner cases for rollup functions 2019-08-15 23:31:28 +03:00
Aliaksandr Valialkin
b8bbe92de1 app/vmselect/promql: store compressed results in the cache 
This should increase rollup results cache capacity.
 2019-08-14 02:32:16 +03:00
Aliaksandr Valialkin
8c2158af24 all: use workingsetcache instead of fastcache 
This should reduce the amount of RAM required for processing time series
with non-zero churn rate.

The previous cache behavior can be restored with `-cache.oldBehavior` command-line flag.
 2019-08-13 21:40:28 +03:00
Aliaksandr Valialkin
f56c1298ad app/vmstorage: add vm_concurrent_addrows_* metrics for tracking concurrency for Storage.AddRows calls 
Track also the number of dropped rows due to the exceeded timeout
on concurrency limit for Storage.AddRows. This number is tracked in `vm_concurrent_addrows_dropped_rows_total`
 2019-08-06 15:08:43 +03:00
Aliaksandr Valialkin
8e05758ff5 app: add vm_concurrent_ metrics for visibility in concurrency limiters for vminsert and vmselect 2019-08-05 18:30:29 +03:00
Aliaksandr Valialkin
53c8f56436 app/vmselect: allow passing match[], start and time to /api/v1/label/<label_name>/values 
`/api/v1/label/<label_name>/values?match[]=q` emulates emulates `label_values(q, <label_name>)`
call in Grafana templating.
 2019-08-04 23:07:00 +03:00
Aliaksandr Valialkin
880b1d80b1 app/vmselect: optimize /api/v1/series by skipping storage data 
Fetch and process only time series metainfo.
 2019-08-04 23:00:46 +03:00
Aliaksandr Valialkin
7f5afae1e3 app/vmselect/prometheus: prevent from fetching and scanning all the data on /api/v1/searies call by default 2019-08-04 19:42:45 +03:00
Aliaksandr Valialkin
000c154641 app/vmselect/promql: tune automatic window adjustement 
Increase the windows adjustement for small scrape intervals,
since they usually have higher jitter.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/139
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/134
 2019-08-04 19:34:11 +03:00
Aliaksandr Valialkin
1d4ddadbb1 app/vmselect/promql: further increase the allowed jitter for scrape interval 
Real-world production data shows higher jitter than 1/8 of scrape interval.
This may results in gaps on the graph. So increase the allowed jitter to 1/4
of scrape interval in order to reduce the probability of gaps on the graphs
over time series with high jitter for scrape_interval.
 2019-08-02 20:16:41 +03:00
Aliaksandr Valialkin
8ed84a4713 app/vminsert/influx: round automatically generated timestamp according to the given precision arg 2019-08-02 00:24:39 +03:00
Aliaksandr Valialkin
ade7bc30db app/vmselect/promql: tolerate higher jitter in scrape interval 
Allow jitter for up to 1/8 instead of 1/16 for the scrape interval.
This should imrpove graphs when `step` is smaller than the `scrape_interval`.
 2019-08-01 23:25:53 +03:00
Aliaksandr Valialkin
c994fbf500 app/vmselect/promql: add vm_slow_queries_total metric for counting slow queries 
The query is slow if its execution time exceeds `-search.logSlowQueryDuration`
 2019-07-31 03:36:45 +03:00
Aliaksandr Valialkin
071a122119 app/vmselect/promql: return NaN from histogram_quantile if at least a single bucket is broken 2019-07-31 01:18:11 +03:00
Aliaksandr Valialkin
b9a16b93e7 app/vmselect/promql: allow adjusting window for default rollup function 
Default rollup function is `last_over_time`. It must support adjusting
the provided window in order to prevent from gaps on the graph
for window values smaller than scrape interval.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/134
 2019-07-31 00:45:58 +03:00
Aliaksandr Valialkin
c901a6472f app/vmselect/promql: return NaN values if invalid bucket counts are passed to histogram_quantile 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/136
 2019-07-30 22:05:55 +03:00
Aliaksandr Valialkin
5b8526e925 app/vmselect/netstorage: improve error message when reading data blocks from storage 
Mention the block number in the error. This should simplify troubleshooting in this code.
 2019-07-28 12:17:33 +03:00
Aliaksandr Valialkin
b7089705b7 app/vminsert: add vm_rows_per_insert summary metric 
This metric should help tuning batch sizes on clients writing data to VictoriaMetrics
 2019-07-27 13:28:20 +03:00
Aliaksandr Valialkin
1fd4e9fb5c app/vminsert: improve error messages for Influx, OpenTSDB and Graphite parsing 
Include in the error message the line which failed to parse.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/127
 2019-07-26 22:09:21 +03:00
Aliaksandr Valialkin
8253790157 app/vmstorage: consistency renaming for ignored rows metrics 
vm_too_big_timestamp_rows_total -> vm_rows_ignored_total{reason="big_timestamp"}
  vm_too_small_timestamp_rows_total -> vm_rows_ignored_total{reason="small_timestamp"}
 2019-07-26 20:02:24 +03:00
Aliaksandr Valialkin
c6bec48927 lib/storage: add metrics for calculating skipped rows outside the retention 
The metrics are:

    - vm_too_big_timestamp_rows_total
    - vm_too_small_timestamp_rows_total
 2019-07-26 14:11:56 +03:00
Aliaksandr Valialkin
aac482517f app/vmselect/promql: return NaN from count() over zero time series 
This aligns `count` behavior with Prometheus.
 2019-07-25 22:02:34 +03:00
Aliaksandr Valialkin
0e52357f35 app/vmselect/promql: properly calculate incremental aggregations grouped by __name__ 
Previously the following query may fail on multiple distinct metric names match:

    sum(count_over_time{__name__!=''}) by (__name__)
 2019-07-25 21:53:26 +03:00
Aliaksandr Valialkin
54f035d4ce all: small updates after PR #114 2019-07-24 17:43:43 +03:00
Aliaksandr Valialkin
cb8104cf77 app: clarify error messages when -storageNode arg is missing in vminsert and vmselect 2019-07-20 10:21:59 +03:00
Aliaksandr Valialkin
2b4254d01f app/vminsert: use netutil.TCPListener for collecting network-related metrics for Graphite and OpenTSDB TCP traffic 2019-07-15 22:58:35 +03:00
Aliaksandr Valialkin
092c9b39a8 app/vmselect/promql: remove empty time series after applying filters like q > 0 
This should reduce CPU and RAM usage for queries over high number of time series.
 2019-07-12 19:59:49 +03:00
Aliaksandr Valialkin
6875fb411a app/vmselect/promql: parallelize incremental aggregation to multiple CPU cores 
This may reduce response times for aggregation over big number of time series
with small step between output data points.
 2019-07-12 15:53:12 +03:00
Aliaksandr Valialkin
4a8e6f47fe app/vmselect/prometheus: set start arg in /api/v1/series to the minimum allowed time by default as Prometheus does 
Fixes https://github.com/VictoriaMetrics/VictoriaMetrics/issues/91
 2019-07-11 17:11:37 +03:00
Aliaksandr Valialkin
3313cdf816 app/vmselect/prometheus: convert negative times to 0, since they arent supported by the storage 2019-07-11 17:11:35 +03:00
Aliaksandr Valialkin
cbab86fd9d app/vmselect/promql: reduce RAM usage for aggregates over big number of time series 
Calculate incremental aggregates for `aggr(metric_selector)` function instead of
keeping all the time series matching the given `metric_selector` in memory.
 2019-07-10 13:03:36 +03:00
Aliaksandr Valialkin
ba8195c58e all: consistency renaming: bytesSize -> sizeBytes 2019-07-10 00:47:42 +03:00
Aliaksandr Valialkin
df6f17b82c app/vmselect/promql: mention -search.logSlowQueryDuration flag value in the slow query log message 2019-07-10 00:43:01 +03:00
Aliaksandr Valialkin
73ae889244 app/vmselect/promql: extract rmoeveGroupTags function for removing unneeded tags from MetricName according to the given modifierExpr 2019-07-09 23:20:58 +03:00
Aliaksandr Valialkin
603b34edbd app/vmselect/promql: properly preserve metric name after applying functions in any case from transformFuncsKeepMetricGroup 2019-07-09 23:10:49 +03:00
Aliaksandr Valialkin
d6ec95693d app/vmselect/prometheus: typo fix 2019-07-07 23:34:04 +03:00
Aliaksandr Valialkin
36636c1f6f app/vmselect/prometheus: handle minTime and maxTime values that may be set by Promxy or Prometheus client 
Fixes https://github.com/VictoriaMetrics/VictoriaMetrics/issues/88
 2019-07-07 21:53:52 +03:00
Aliaksandr Valialkin
bba07d05fe app/vmselect/promql: remove empty timeseries left after topk call 2019-07-04 19:43:07 +03:00