Ullmhaíodh aistriúchán an ailt go sonrach do mhic léinn an chúrsa .
is bunachar sonraí colún foinse oscailte é. Is timpeallacht iontach é inar féidir leis na céadta anailísí sonraí mionsonraithe a fhiosrú go tapa, fiú nuair a chuirtear isteach na mílte de thaifid nua in aghaidh an lae. D’fhéadfadh costais bonneagair chun tacú le córas den sórt sin a bheith chomh hard le $100 in aghaidh na bliana, agus b’fhéidir leath sin ag brath ar úsáid. Ag pointe amháin, bhí 10 trilliún taifead i suiteáil ClickHouse ó Yandex Metrics. Chomh maith le Yandex, d'éirigh le ClickHouse le Bloomberg agus Cloudflare.
Dhá bhliain ó shin chaith mé bunachair shonraí ag baint úsáide as meaisín amháin, agus bhí sé Bogearraí bunachar sonraí saor in aisce a chonaic mé riamh. Ó shin i leith, níor stop na forbróirí gnéithe a chur leis, lena n-áirítear tacaíocht do chomhbhrú Kafka, HDFS agus ZStandard. Anuraidh chuir siad tacaíocht le modhanna comhbhrú cascáideacha, agus bhí códú indéanta. Agus sonraí sraith ama á gcomhbhrú, is féidir luachanna tomhsaire a chomhbhrú go maith ag baint úsáide as ionchódú delta, ach le haghaidh cuntair bheadh sé níos fearr ionchódú delta-by-delta a úsáid. Tá comhbhrú maith anois mar an eochair do fheidhmíocht ClickHouse.
Is éard atá i ClickHouse ná 170 míle líne de chód C++, gan leabharlanna tríú páirtí a áireamh, agus tá sé ar cheann de na bunachair chód bunachar sonraí dáilte is lú. I gcomparáid leis sin, ní thacaíonn SQLite le dáileadh agus tá sé comhdhéanta de 235 míle líne de chód C. Ón scríbhinn seo, chuir 207 innealtóir le ClickHouse, agus tá déine na ngealltanas ag méadú le déanaí.
I mí an Mhárta 2017, thosaigh ClickHouse ag stiúradh mar bhealach éasca le súil a choinneáil ar an bhforbairt. Bhris siad freisin an comhad doiciméadaithe monolithic isteach i ordlathas comhad Markdown-bhunaithe. Déantar saincheisteanna agus gnéithe a rianú trí GitHub, agus go ginearálta tá na bogearraí i bhfad níos inrochtana le cúpla bliain anuas.
San Airteagal seo, táim chun breathnú ar fheidhmíocht braisle ClickHouse ar AWS EC2 ag baint úsáide as próiseálaithe 36-lárnach agus stóráil NVMe.
Suas chun dáta: Seachtain tar éis an post seo a fhoilsiú ar dtús, rinne mé an tástáil a athchur le cumraíocht fheabhsaithe agus bhain mé torthaí i bhfad níos fearr amach. Nuashonraíodh an postáil seo chun na hathruithe seo a léiriú.
Ag seoladh Braisle AWS EC2
Beidh trí chás c5d.9xlarge EC2 á n-úsáid agam don phost seo. Tá 36 CPU fíorúil i ngach ceann acu, 72 GB RAM, 900 GB de stóráil NVMe SSD agus tacaíonn sé le líonra 10 Gigabit. Chosain siad $1,962 in aghaidh na huaire an ceann i réigiún ae-iarthar-1 agus iad ag rith ar éileamh. Beidh mé ag baint úsáide as Ubuntu Server 16.04 LTS mar an córas oibriúcháin.
Tá an balla dóiteáin cumraithe ionas gur féidir le gach meaisín cumarsáid a dhéanamh lena chéile gan srianta, agus níl ach mo sheoladh IPv4 bánliostaithe ag SSH sa bhraisle.
Tiomáint NVMe i staid ullmhachta oibriúcháin
Chun ClickHouse a bheith ag obair, cruthóidh mé córas comhaid san fhormáid EXT4 ar thiomáint NVMe ar gach ceann de na freastalaithe.
$ sudo mkfs -t ext4 /dev/nvme1n1
$ sudo mkdir /ch
$ sudo mount /dev/nvme1n1 /chNuair a bheidh gach rud cumraithe, is féidir leat an pointe mount agus an 783 GB de spás atá ar fáil ar gach córas a fheiceáil.
$ lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 87.9M 1 loop /snap/core/5742
loop1 7:1 0 16.5M 1 loop /snap/amazon-ssm-agent/784
nvme0n1 259:1 0 8G 0 disk
└─nvme0n1p1 259:2 0 8G 0 part /
nvme1n1 259:0 0 838.2G 0 disk /ch$ df -hFilesystem Size Used Avail Use% Mounted on
udev 35G 0 35G 0% /dev
tmpfs 6.9G 8.8M 6.9G 1% /run
/dev/nvme0n1p1 7.7G 967M 6.8G 13% /
tmpfs 35G 0 35G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 35G 0 35G 0% /sys/fs/cgroup
/dev/loop0 88M 88M 0 100% /snap/core/5742
/dev/loop1 17M 17M 0 100% /snap/amazon-ssm-agent/784
tmpfs 6.9G 0 6.9G 0% /run/user/1000
/dev/nvme1n1 825G 73M 783G 1% /chIs é an tacar sonraí a úsáidfidh mé sa tástáil seo ná dumpáil sonraí a ghin mé ó 1.1 billiún turas tacsaí a tógadh i gCathair Nua-Eabhrac thar sé bliana. Ar an bhlag sonraí conas a bhailigh mé an tacar sonraí seo. Stóráiltear iad in AWS S3, mar sin déanfaidh mé an AWS CLI a chumrú le mo chuid eochracha rochtana agus rúnda.
$ sudo apt update
$ sudo apt install awscli
$ aws configureSocróidh mé teorainn iarratais chomhthráthach an chliaint go 100 ionas go n-íoslódálfar comhaid níos tapúla ná na socruithe réamhshocraithe.
$ aws configure set
default.s3.max_concurrent_requests
100Íoslódáil mé an tacar sonraí turas tacsaí ó AWS S3 agus stórálfaidh mé é ar thiomáint NVMe ar an gcéad fhreastalaí. Tá ~104GB sa tacar sonraí seo i bhformáid CSV-chomhbhrúite GZIP.
$ sudo mkdir -p /ch/csv
$ sudo chown -R ubuntu /ch/csv
$ aws s3 sync s3://<bucket>/csv /ch/csvSuiteáil ClickHouse
Suiteáilfidh mé an dáileadh OpenJDK do Java 8 mar go bhfuil sé riachtanach Apache ZooKeeper a reáchtáil, atá ag teastáil le haghaidh suiteáil scaipthe ClickHouse ar na trí mheaisín.
$ sudo apt update
$ sudo apt install
openjdk-8-jre
openjdk-8-jdk-headless
Ansin leag mé an athróg timpeallachta JAVA_HOME.
$ sudo vi /etc/profile
export JAVA_HOME=/usr
$ source /etc/profileÚsáidfidh mé córas bainistíochta pacáiste Ubuntu ansin chun ClickHouse 18.16.1, amharc agus ZooKeeper a shuiteáil ar na trí mheaisín.
$ sudo apt-key adv
--keyserver hkp://keyserver.ubuntu.com:80
--recv E0C56BD4
$ echo "deb http://repo.yandex.ru/clickhouse/deb/stable/ main/" |
sudo tee /etc/apt/sources.list.d/clickhouse.list
$ sudo apt-get update$ sudo apt install
clickhouse-client
clickhouse-server
glances
zookeeperdCruthóidh mé eolaire do ClickHouse agus déanfaidh mé roinnt sáruithe cumraíochta ar na trí fhreastalaí go léir.
$ sudo mkdir /ch/clickhouse
$ sudo chown -R clickhouse /ch/clickhouse
$ sudo mkdir -p /etc/clickhouse-server/conf.d
$ sudo vi /etc/clickhouse-server/conf.d/taxis.confSeo iad na sáruithe cumraíochta a bheidh in úsáid agam.
<?xml version="1.0"?>
<yandex>
<listen_host>0.0.0.0</listen_host>
<path>/ch/clickhouse/</path>
<remote_servers>
<perftest_3shards>
<shard>
<replica>
<host>172.30.2.192</host>
<port>9000</port>
</replica>
</shard>
<shard>
<replica>
<host>172.30.2.162</host>
<port>9000</port>
</replica>
</shard>
<shard>
<replica>
<host>172.30.2.36</host>
<port>9000</port>
</replica>
</shard>
</perftest_3shards>
</remote_servers> <zookeeper-servers>
<node>
<host>172.30.2.192</host>
<port>2181</port>
</node>
<node>
<host>172.30.2.162</host>
<port>2181</port>
</node>
<node>
<host>172.30.2.36</host>
<port>2181</port>
</node>
</zookeeper-servers> <macros>
<shard>03</shard>
<replica>01</replica>
</macros>
</yandex>Rithfidh mé ZooKeeper agus an freastalaí ClickHouse ar na trí mheaisín ansin.
$ sudo /etc/init.d/zookeeper start
$ sudo service clickhouse-server startSonraí á n-uaslódáil chuig ClickHouse
Ar an gcéad fhreastalaí cruthóidh mé tábla turais (trips), a stórálfar tacar sonraí de thurais tacsaí ag baint úsáide as an inneall Log.
$ clickhouse-client --host=0.0.0.0
CREATE TABLE trips (
trip_id UInt32,
vendor_id String,
pickup_datetime DateTime,
dropoff_datetime Nullable(DateTime),
store_and_fwd_flag Nullable(FixedString(1)),
rate_code_id Nullable(UInt8),
pickup_longitude Nullable(Float64),
pickup_latitude Nullable(Float64),
dropoff_longitude Nullable(Float64),
dropoff_latitude Nullable(Float64),
passenger_count Nullable(UInt8),
trip_distance Nullable(Float64),
fare_amount Nullable(Float32),
extra Nullable(Float32),
mta_tax Nullable(Float32),
tip_amount Nullable(Float32),
tolls_amount Nullable(Float32),
ehail_fee Nullable(Float32),
improvement_surcharge Nullable(Float32),
total_amount Nullable(Float32),
payment_type Nullable(String),
trip_type Nullable(UInt8),
pickup Nullable(String),
dropoff Nullable(String),
cab_type Nullable(String),
precipitation Nullable(Int8),
snow_depth Nullable(Int8),
snowfall Nullable(Int8),
max_temperature Nullable(Int8),
min_temperature Nullable(Int8),
average_wind_speed Nullable(Int8),
pickup_nyct2010_gid Nullable(Int8),
pickup_ctlabel Nullable(String),
pickup_borocode Nullable(Int8),
pickup_boroname Nullable(String),
pickup_ct2010 Nullable(String),
pickup_boroct2010 Nullable(String),
pickup_cdeligibil Nullable(FixedString(1)),
pickup_ntacode Nullable(String),
pickup_ntaname Nullable(String),
pickup_puma Nullable(String),
dropoff_nyct2010_gid Nullable(UInt8),
dropoff_ctlabel Nullable(String),
dropoff_borocode Nullable(UInt8),
dropoff_boroname Nullable(String),
dropoff_ct2010 Nullable(String),
dropoff_boroct2010 Nullable(String),
dropoff_cdeligibil Nullable(String),
dropoff_ntacode Nullable(String),
dropoff_ntaname Nullable(String),
dropoff_puma Nullable(String)
) ENGINE = Log;
Bainim agus lódálann mé gach ceann de na comhaid CSV isteach i dtábla turais (trips). Críochnaíodh an méid seo a leanas i 55 nóiméad agus 10 soicind. Tar éis na hoibríochta seo, ba é méid an eolaire sonraí ná 134 GB.
$ time (for FILENAME in /ch/csv/trips_x*.csv.gz; do
echo $FILENAME
gunzip -c $FILENAME |
clickhouse-client
--host=0.0.0.0
--query="INSERT INTO trips FORMAT CSV"
done)Ba é an luas iompórtála ná 155 MB d'ábhar CSV neamh-chomhbhrúite in aghaidh an tsoicind. Tá amhras orm gur tharla sé seo mar gheall ar bhac i ndí-chomhbhrú GZIP. Seans go raibh sé níos tapúla na comhaid gzipped go léir a dhízipeáil ag an am céanna ag baint úsáide as xargs agus ansin na sonraí unzipped a luchtú. Seo thíos cur síos ar an méid a tuairiscíodh le linn phróiseas allmhairithe CSV.
$ sudo glancesip-172-30-2-200 (Ubuntu 16.04 64bit / Linux 4.4.0-1072-aws) Uptime: 0:11:42
CPU 8.2% nice: 0.0% LOAD 36-core MEM 9.8% active: 5.20G SWAP 0.0%
user: 6.0% irq: 0.0% 1 min: 2.24 total: 68.7G inactive: 61.0G total: 0
system: 0.9% iowait: 1.3% 5 min: 1.83 used: 6.71G buffers: 66.4M used: 0
idle: 91.8% steal: 0.0% 15 min: 1.01 free: 62.0G cached: 61.6G free: 0
NETWORK Rx/s Tx/s TASKS 370 (507 thr), 2 run, 368 slp, 0 oth sorted automatically by cpu_percent, flat view
ens5 136b 2Kb
lo 343Mb 343Mb CPU% MEM% VIRT RES PID USER NI S TIME+ IOR/s IOW/s Command
100.4 1.5 1.65G 1.06G 9909 ubuntu 0 S 1:01.33 0 0 clickhouse-client --host=0.0.0.0 --query=INSERT INTO trips FORMAT CSV
DISK I/O R/s W/s 85.1 0.0 4.65M 708K 9908 ubuntu 0 R 0:50.60 32M 0 gzip -d -c /ch/csv/trips_xac.csv.gz
loop0 0 0 54.9 5.1 8.14G 3.49G 8091 clickhous 0 S 1:44.23 0 45M /usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml
loop1 0 0 4.5 0.0 0 0 319 root 0 S 0:07.50 1K 0 kworker/u72:2
nvme0n1 0 3K 2.3 0.0 91.1M 28.9M 9912 root 0 R 0:01.56 0 0 /usr/bin/python3 /usr/bin/glances
nvme0n1p1 0 3K 0.3 0.0 0 0 960 root -20 S 0:00.10 0 0 kworker/28:1H
nvme1n1 32.1M 495M 0.3 0.0 0 0 1058 root -20 S 0:00.90 0 0 kworker/23:1HSaorfaidh mé spás ar an tiomántán NVMe trí na comhaid CSV bunaidh a scriosadh sula leanann mé ar aghaidh.
$ sudo rm -fr /ch/csvTiontaigh go Foirm Colún
Déanfaidh an t-inneall Log ClickHouse sonraí a stóráil i bhformáid atá dírithe ar a chéile. Chun sonraí a fhiosrú níos tapúla, déanaim é a thiontú go formáid cholún ag baint úsáide as an inneall MergeTree.
$ clickhouse-client --host=0.0.0.0Críochnaíodh an méid seo a leanas i 34 nóiméad agus 50 soicind. Tar éis na hoibríochta seo, ba é méid an eolaire sonraí ná 237 GB.
CREATE TABLE trips_mergetree
ENGINE = MergeTree(pickup_date, pickup_datetime, 8192)
AS SELECT
trip_id,
CAST(vendor_id AS Enum8('1' = 1,
'2' = 2,
'CMT' = 3,
'VTS' = 4,
'DDS' = 5,
'B02512' = 10,
'B02598' = 11,
'B02617' = 12,
'B02682' = 13,
'B02764' = 14)) AS vendor_id,
toDate(pickup_datetime) AS pickup_date,
ifNull(pickup_datetime, toDateTime(0)) AS pickup_datetime,
toDate(dropoff_datetime) AS dropoff_date,
ifNull(dropoff_datetime, toDateTime(0)) AS dropoff_datetime,
assumeNotNull(store_and_fwd_flag) AS store_and_fwd_flag,
assumeNotNull(rate_code_id) AS rate_code_id,
assumeNotNull(pickup_longitude) AS pickup_longitude,
assumeNotNull(pickup_latitude) AS pickup_latitude,
assumeNotNull(dropoff_longitude) AS dropoff_longitude,
assumeNotNull(dropoff_latitude) AS dropoff_latitude,
assumeNotNull(passenger_count) AS passenger_count,
assumeNotNull(trip_distance) AS trip_distance,
assumeNotNull(fare_amount) AS fare_amount,
assumeNotNull(extra) AS extra,
assumeNotNull(mta_tax) AS mta_tax,
assumeNotNull(tip_amount) AS tip_amount,
assumeNotNull(tolls_amount) AS tolls_amount,
assumeNotNull(ehail_fee) AS ehail_fee,
assumeNotNull(improvement_surcharge) AS improvement_surcharge,
assumeNotNull(total_amount) AS total_amount,
assumeNotNull(payment_type) AS payment_type_,
assumeNotNull(trip_type) AS trip_type,
pickup AS pickup,
pickup AS dropoff,
CAST(assumeNotNull(cab_type)
AS Enum8('yellow' = 1, 'green' = 2))
AS cab_type,
precipitation AS precipitation,
snow_depth AS snow_depth,
snowfall AS snowfall,
max_temperature AS max_temperature,
min_temperature AS min_temperature,
average_wind_speed AS average_wind_speed,
pickup_nyct2010_gid AS pickup_nyct2010_gid,
pickup_ctlabel AS pickup_ctlabel,
pickup_borocode AS pickup_borocode,
pickup_boroname AS pickup_boroname,
pickup_ct2010 AS pickup_ct2010,
pickup_boroct2010 AS pickup_boroct2010,
pickup_cdeligibil AS pickup_cdeligibil,
pickup_ntacode AS pickup_ntacode,
pickup_ntaname AS pickup_ntaname,
pickup_puma AS pickup_puma,
dropoff_nyct2010_gid AS dropoff_nyct2010_gid,
dropoff_ctlabel AS dropoff_ctlabel,
dropoff_borocode AS dropoff_borocode,
dropoff_boroname AS dropoff_boroname,
dropoff_ct2010 AS dropoff_ct2010,
dropoff_boroct2010 AS dropoff_boroct2010,
dropoff_cdeligibil AS dropoff_cdeligibil,
dropoff_ntacode AS dropoff_ntacode,
dropoff_ntaname AS dropoff_ntaname,
dropoff_puma AS dropoff_puma
FROM trips;Seo an chuma a bhí ar an aschur sracfhéachaint le linn na hoibríochta:
ip-172-30-2-200 (Ubuntu 16.04 64bit / Linux 4.4.0-1072-aws) Uptime: 1:06:09
CPU 10.3% nice: 0.0% LOAD 36-core MEM 16.1% active: 13.3G SWAP 0.0%
user: 7.9% irq: 0.0% 1 min: 1.87 total: 68.7G inactive: 52.8G total: 0
system: 1.6% iowait: 0.8% 5 min: 1.76 used: 11.1G buffers: 71.8M used: 0
idle: 89.7% steal: 0.0% 15 min: 1.95 free: 57.6G cached: 57.2G free: 0
NETWORK Rx/s Tx/s TASKS 367 (523 thr), 1 run, 366 slp, 0 oth sorted automatically by cpu_percent, flat view
ens5 1Kb 8Kb
lo 2Kb 2Kb CPU% MEM% VIRT RES PID USER NI S TIME+ IOR/s IOW/s Command
241.9 12.8 20.7G 8.78G 8091 clickhous 0 S 30:36.73 34M 125M /usr/bin/clickhouse-server --config=/etc/clickhouse-server/config.xml
DISK I/O R/s W/s 2.6 0.0 90.4M 28.3M 9948 root 0 R 1:18.53 0 0 /usr/bin/python3 /usr/bin/glances
loop0 0 0 1.3 0.0 0 0 203 root 0 S 0:09.82 0 0 kswapd0
loop1 0 0 0.3 0.1 315M 61.3M 15701 ubuntu 0 S 0:00.40 0 0 clickhouse-client --host=0.0.0.0
nvme0n1 0 3K 0.3 0.0 0 0 7 root 0 S 0:00.83 0 0 rcu_sched
nvme0n1p1 0 3K 0.0 0.0 0 0 142 root 0 S 0:00.22 0 0 migration/27
nvme1n1 25.8M 330M 0.0 0.0 59.7M 1.79M 2764 ubuntu 0 S 0:00.00 0 0 (sd-pam)Sa tástáil dheireanach, rinneadh roinnt colún a thiontú agus a athríomh. Chinn mé nach n-oibríonn cuid de na feidhmeanna seo a thuilleadh mar a bhíothas ag súil leis ar an tacar sonraí seo. Chun an fhadhb seo a réiteach, bhain mé na feidhmeanna míchuí agus luchtaigh mé na sonraí gan a thiontú go cineálacha níos gráinneach.
Dáileadh sonraí ar fud an bhraisle
Dáilfidh mé na sonraí ar na trí nód braisle. Chun tús a chur, thíos cruthóidh mé tábla ar na trí mheaisín.
$ clickhouse-client --host=0.0.0.0CREATE TABLE trips_mergetree_third (
trip_id UInt32,
vendor_id String,
pickup_date Date,
pickup_datetime DateTime,
dropoff_date Date,
dropoff_datetime Nullable(DateTime),
store_and_fwd_flag Nullable(FixedString(1)),
rate_code_id Nullable(UInt8),
pickup_longitude Nullable(Float64),
pickup_latitude Nullable(Float64),
dropoff_longitude Nullable(Float64),
dropoff_latitude Nullable(Float64),
passenger_count Nullable(UInt8),
trip_distance Nullable(Float64),
fare_amount Nullable(Float32),
extra Nullable(Float32),
mta_tax Nullable(Float32),
tip_amount Nullable(Float32),
tolls_amount Nullable(Float32),
ehail_fee Nullable(Float32),
improvement_surcharge Nullable(Float32),
total_amount Nullable(Float32),
payment_type Nullable(String),
trip_type Nullable(UInt8),
pickup Nullable(String),
dropoff Nullable(String),
cab_type Nullable(String),
precipitation Nullable(Int8),
snow_depth Nullable(Int8),
snowfall Nullable(Int8),
max_temperature Nullable(Int8),
min_temperature Nullable(Int8),
average_wind_speed Nullable(Int8),
pickup_nyct2010_gid Nullable(Int8),
pickup_ctlabel Nullable(String),
pickup_borocode Nullable(Int8),
pickup_boroname Nullable(String),
pickup_ct2010 Nullable(String),
pickup_boroct2010 Nullable(String),
pickup_cdeligibil Nullable(FixedString(1)),
pickup_ntacode Nullable(String),
pickup_ntaname Nullable(String),
pickup_puma Nullable(String),
dropoff_nyct2010_gid Nullable(UInt8),
dropoff_ctlabel Nullable(String),
dropoff_borocode Nullable(UInt8),
dropoff_boroname Nullable(String),
dropoff_ct2010 Nullable(String),
dropoff_boroct2010 Nullable(String),
dropoff_cdeligibil Nullable(String),
dropoff_ntacode Nullable(String),
dropoff_ntaname Nullable(String),
dropoff_puma Nullable(String)
) ENGINE = MergeTree(pickup_date, pickup_datetime, 8192);Ansin déanfaidh mé cinnte go bhfeicfidh an chéad fhreastalaí na trí nóid go léir sa bhraisle.
SELECT *
FROM system.clusters
WHERE cluster = 'perftest_3shards'
FORMAT Vertical;Row 1:
──────
cluster: perftest_3shards
shard_num: 1
shard_weight: 1
replica_num: 1
host_name: 172.30.2.192
host_address: 172.30.2.192
port: 9000
is_local: 1
user: default
default_database:Row 2:
──────
cluster: perftest_3shards
shard_num: 2
shard_weight: 1
replica_num: 1
host_name: 172.30.2.162
host_address: 172.30.2.162
port: 9000
is_local: 0
user: default
default_database:Row 3:
──────
cluster: perftest_3shards
shard_num: 3
shard_weight: 1
replica_num: 1
host_name: 172.30.2.36
host_address: 172.30.2.36
port: 9000
is_local: 0
user: default
default_database:
Ansin saineoidh mé tábla nua ar an gcéad fhreastalaí atá bunaithe ar an scéimre trips_mergetree_third agus úsáideann an t-inneall Dáilte.
CREATE TABLE trips_mergetree_x3
AS trips_mergetree_third
ENGINE = Distributed(perftest_3shards,
default,
trips_mergetree_third,
rand());Déanfaidh mé na sonraí a chóipeáil ansin ón tábla MergeTree atá bunaithe ar na trí fhreastalaí. Críochnaíodh an méid seo a leanas i 34 nóiméad agus 44 soicind.
INSERT INTO trips_mergetree_x3
SELECT * FROM trips_mergetree;Tar éis na hoibríochta thuas, thug mé 15 nóiméad ClickHouse chun bogadh ar shiúl ón marc leibhéal stórála uasta. Ba é 264 GB, 34 GB agus 33 GB faoi seach na heolairí sonraí ar gach ceann de na trí fhreastalaí.
Meastóireacht feidhmíochta braisle ClickHouse
Ba é an chéad rud a chonaic mé ina dhiaidh sin an t-am is tapúla atá feicthe agam ag rith gach fiosrúcháin ar bhord go minic trips_mergetree_x3.
$ clickhouse-client --host=0.0.0.0Chríochnaigh an méid seo a leanas i 2.449 soicind.
SELECT cab_type, count(*)
FROM trips_mergetree_x3
GROUP BY cab_type;Chríochnaigh an méid seo a leanas i 0.691 soicind.
SELECT passenger_count,
avg(total_amount)
FROM trips_mergetree_x3
GROUP BY passenger_count;Chríochnaigh an méid seo a leanas i 0 soicind.
SELECT passenger_count,
toYear(pickup_date) AS year,
count(*)
FROM trips_mergetree_x3
GROUP BY passenger_count,
year;Chríochnaigh an méid seo a leanas i 0.983 soicind.
SELECT passenger_count,
toYear(pickup_date) AS year,
round(trip_distance) AS distance,
count(*)
FROM trips_mergetree_x3
GROUP BY passenger_count,
year,
distance
ORDER BY year,
count(*) DESC;Chun comparáid a dhéanamh, rith mé na ceisteanna céanna ar thábla MergeTree-bhunaithe a chónaíonn ar an gcéad fhreastalaí amháin.
Meastóireacht feidhmíochta ar nód ClickHouse amháin
Ba é an chéad rud a chonaic mé ina dhiaidh sin an t-am is tapúla atá feicthe agam ag rith gach fiosrúcháin ar bhord go minic trips_mergetree_x3.
Chríochnaigh an méid seo a leanas i 0.241 soicind.
SELECT cab_type, count(*)
FROM trips_mergetree
GROUP BY cab_type;Chríochnaigh an méid seo a leanas i 0.826 soicind.
SELECT passenger_count,
avg(total_amount)
FROM trips_mergetree
GROUP BY passenger_count;Chríochnaigh an méid seo a leanas i 1.209 soicind.
SELECT passenger_count,
toYear(pickup_date) AS year,
count(*)
FROM trips_mergetree
GROUP BY passenger_count,
year;Chríochnaigh an méid seo a leanas i 1.781 soicind.
SELECT passenger_count,
toYear(pickup_date) AS year,
round(trip_distance) AS distance,
count(*)
FROM trips_mergetree
GROUP BY passenger_count,
year,
distance
ORDER BY year,
count(*) DESC;Machnamh ar na torthaí
Is é seo an chéad uair a bhí bunachar sonraí CPU-bhunaithe saor in aisce in ann feidhmíocht níos fearr a bhaint as bunachar sonraí GPU-bhunaithe i mo thástálacha. Tá dhá athbhreithniú déanta ar an mbunachar sonraí GPU-bhunaithe sin ó shin i leith, ach tá an fheidhmíocht a sheachaid ClickHouse ar nód amháin thar a bheith suntasach mar sin féin.
Ag an am céanna, agus Iarratas 1 á fhorghníomhú ar inneall dáilte, tá na forchostais ordú méide níos airde. Tá súil agam gur chaill mé rud éigin i mo thaighde don phost seo mar bheadh sé go deas amanna fiosrúcháin a fheiceáil ag laghdú agus mé ag cur níos mó nóid leis an mbraisle. Mar sin féin, is iontach an rud é gur tháinig méadú 2 uair ar fheidhmíocht nuair a bhí fiosrúcháin eile á ndéanamh.
Bheadh sé go deas ClickHouse a fheiceáil ag forbairt i dtreo a bheith in ann stóráil a scaradh agus a ríomh ionas gur féidir leo scála neamhspleách a dhéanamh. D’fhéadfadh tacaíocht HDFS, a cuireadh leis anuraidh, a bheith ina chéim i dtreo seo. Maidir leis an ríomhaireacht, más féidir ceist amháin a luathú trí níos mó nóid a chur leis an mbraisle, ansin tá todhchaí na bogearraí seo an-gheal.
Go raibh maith agat as an am a ghlacadh chun an post seo a léamh. Cuirim seirbhísí comhairliúcháin, ailtireachta agus forbartha cleachtais ar fáil do chliaint i Meiriceá Thuaidh agus san Eoraip. Más mian leat conas is féidir le mo chuid moltaí cabhrú le do ghnó a phlé, déan teagmháil liom trí .
Foinse: will.com