Kuturikirwa kwechinyorwa kwakagadzirirwa zvakananga vadzidzi vekosi .
ndeye yakavhurwa sosi columnar database. Inzvimbo yakanaka uko mazana evaongorori vanogona kukurumidza kubvunza zvakadzama data, kunyangwe makumi emabhiriyoni emarekodhi matsva anopinzwa pazuva. Mari yezvivakwa zvekutsigira system yakadai inogona kunge yakakwira semadhora zana pagore, uye ingangoita hafu iyo zvichienderana nekushandiswa. Pane imwe nguva, iyo ClickHouse kuisirwa kubva kuYandex Metrics yaive negumi matrillion marekodhi. Pamusoro peYandex, ClickHouse yakawanawo kubudirira neBloomberg uye Cloudflare.
Makore maviri apfuura ndakapedza databases vachishandisa muchina mumwe, uye yakava yemahara database software yandakamboona. Kubva ipapo, vagadziri vakaramba vachiwedzera maficha, kusanganisira kutsigirwa kweKafka, HDFS uye ZStandard compression. Gore rakapera vakawedzera tsigiro ye cascading compression nzira, uye kukodha kwakagoneka. Kana uchidzvanya data yenguva yakatevedzana, geji nhanho dzinogona kudzvanywa zvakanaka uchishandisa delta encoding, asi kumakaunda zvingave nani kushandisa delta-by-delta encoding. Kudzvanya kwakanaka kwave kiyi yekuita kweClickHouse.
ClickHouse ine zviuru zana nemakumi manomwe ezviuru zvemitsara yeC ++ kodhi, isingasanganisire echitatu-bato raibhurari, uye ndeimwe yemadiki akagoverwa dhatabhesi codebases. Mukufananidza, SQLite haitsigire kugovera uye ine zviuru mazana maviri nemakumi matatu neshanu mitsara yekodhi C. Sezvo pakunyora uku, mainjiniya e170 vakabatsira kuClickHouse, uye kusimba kwezvipo kuri kuwedzera munguva pfupi yapfuura.
Muna Kurume 2017, ClickHouse yakatanga kuita senzira iri nyore yekuchengeta track yebudiriro. Ivo zvakare vakatyora iyo monolithic zvinyorwa faira kuita Markdown-based faira hierarchy. Nyaya uye maficha anoteverwa kuburikidza neGitHub, uye kazhinji software yave kuwanikwa zvakanyanya mumakore mashoma apfuura.
Muchikamu chino, ini ndichatarisa mashandiro eClickHouse cluster paAWS EC2 uchishandisa 36-core processors uye NVMe kuchengetedza.
ZVAKAITIKA: Vhiki mushure mekutanga kuburitsa chinyorwa ichi, ndakadzokorora bvunzo negadziriso yakagadziridzwa uye ndakawana mhedzisiro iri nani. Ichi chinyorwa chakagadziridzwa kuratidza shanduko idzi.
Kuvhura iyo AWS EC2 Cluster
Ndichange ndichishandisa matatu c5d.9xlarge EC2 zviitiko zvechinyorwa ichi. Imwe neimwe ine 36 chaiyo CPUs, 72 GB ye RAM, 900 GB yeNVMe SSD yekuchengetedza uye inotsigira gumi Gigabit network. Vanodhura $10/awa imwe neimwe mudunhu reeu-kumadokero-1,962 kana vachimhanya pane zvinodiwa. Ini ndichave ndichishandisa Ubuntu Server 1 LTS seyo inoshanda sisitimu.
Iyo firewall inogadziriswa kuitira kuti muchina wega wega ugone kutaurirana pasina zvirambidzo, uye chete IPv4 kero yangu yakacheneswa neSSH musumbu.
NVMe drive mune yekushanda kugadzirira mamiriro
Kuti ClickHouse ishande, ini ndichagadzira faira system muEXT4 fomati pane NVMe drive pane yega yega maseva.
$ sudo mkfs -t ext4 /dev/nvme1n1
$ sudo mkdir /ch
$ sudo mount /dev/nvme1n1 /chKana zvese zvagadziriswa, unogona kuona nzvimbo yekukwira uye iyo 783 GB yenzvimbo inowanikwa pane yega yega system.
$ 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
ββnvme0n1p1 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% /chIyo dataset yandichashandisa muyedzo iyi idhata rekurasirwa dhata randakagadzira kubva pabhiriyoni imwe chete. Pa blog inotsanangura matorero andakaita iyi data seti. Izvo zvakachengetwa muAWS S3, saka ini ndichagadzirisa iyo AWS CLI nekuwana kwangu uye makiyi akavanzika.
$ sudo apt update
$ sudo apt install awscli
$ aws configureIni ndichaisa mutengi wekukumbira panguva imwechete yekukumbira kusvika ku100 kuti mafaera atore nekukasira kupfuura zvigadziriso zvimiro.
$ aws configure set
default.s3.max_concurrent_requests
100Ini ndichadhawunirodha tekisi inokwira dhata kubva kuAWS S3 ndoichengeta paNVMe drive pane yekutanga server. Iyi dataset ndeye ~104GB muGZIP-yakadzvanywa CSV fomati.
$ sudo mkdir -p /ch/csv
$ sudo chown -R ubuntu /ch/csv
$ aws s3 sync s3://<bucket>/csv /ch/csvClickHouse kuiswa
Ini ndichaisa iyo OpenJDK kugovera kweJava 8 sezvinodiwa kuti umhanye Apache ZooKeeper, inodiwa pakuisirwa kuiswa kweClickHouse pamakina ese matatu.
$ sudo apt update
$ sudo apt install
openjdk-8-jre
openjdk-8-jdk-headless
Ipapo ini ndakaseta iyo nharaunda inoshanduka JAVA_HOME.
$ sudo vi /etc/profile
export JAVA_HOME=/usr
$ source /etc/profileIni ndichabva ndashandisa Ubuntu's package manejimendi system yekuisa ClickHouse 18.16.1, glances uye ZooKeeper pamakina ese matatu.
$ 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
zookeeperdIni ndichagadzira dhairekitori reClickHouse uye zvakare kuita mamwe magadzirirwo anodarika pamasevha ese matatu.
$ 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.confAya ndiwo magadzirirwo anodarika andichange ndichishandisa.
<?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>Ini ndichabva ndamhanyisa ZooKeeper uye ClickHouse server pamichina yese mitatu.
$ sudo /etc/init.d/zookeeper start
$ sudo service clickhouse-server startKurodha data kuClickHouse
Pane yekutanga server ini ndichagadzira tafura yerwendo (trips), iyo inochengetedza dhatabheti yenzendo dzetekisi uchishandisa iyo Log injini.
$ 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;
Ini ndobva ndatora uye ndinorodha yega yega CSV mafaera mutafura yerwendo (trips) Izvi zvinotevera zvakapedzwa mumaminetsi makumi mashanu nemashanu nemasekonzi gumi. Mushure mekuita uku, saizi yedhairekitori yedata yaive 55 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)Iyo yekumhanyisa yekupinza yaive 155 MB yezvisina kudzvanywa CSV zvemukati pasekondi. Ini ndinofungidzira kuti izvi zvakakonzerwa nebhodhoro muGZIP decompression. Zvingave zvakakurumidza kuvhura mafaera ese gzipped akafanana uchishandisa xargs uye wozoisa iyo isina kuvharwa data. Pazasi pane tsananguro yezvakashumwa panguva ye CSV kupinza maitiro.
$ 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/23:1HIni ndichasunungura nzvimbo paNVMe drive nekudzima mafaira ekutanga CSV ndisati ndaenderera mberi.
$ sudo rm -fr /ch/csvShandura kuFomu yeColumn
Iyo Log ClickHouse injini inochengeta data mumutsara-yakatarisana fomati. Kuti ubvunze data nekukurumidza, ndinoishandura kuita columnar fomati ndichishandisa injini yeMergeTree.
$ clickhouse-client --host=0.0.0.0Izvi zvinotevera zvakapedzwa mumaminitsi makumi matatu nemana nemasekonzi makumi mashanu. Mushure mekuita uku, saizi yedhairekitori yedata yaive 34 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;Izvi ndizvo zvainge zvakaita glance kubuda panguva yekushanda:
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)Muyedzo yekupedzisira, makoramu akati wandei akashandurwa uye akaverengerwazve. Ndakaona kuti mamwe emabasa aya haasisiri kushanda sezvaitarisirwa pane iyi dataset. Kuti ndigadzirise dambudziko iri, ndakabvisa mabasa asina kufanira uye ndikaisa iyo data pasina kushandura kune mamwe marudzi egranular.
Kugoverwa kwedata muboka rose
Ini ndichagovera iyo data kune ese matatu cluster node. Kutanga, pazasi ini ndichagadzira tafura pamashini ese matatu.
$ 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);Ipapo ini ndichaita shuwa kuti sevha yekutanga inogona kuona ese matatu node musumbu.
SELECT *
FROM system.clusters
WHERE cluster = 'perftest_3shards'
FORMAT Vertical;Row 1:
ββββββ
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:
ββββββ
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:
ββββββ
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:
Ipapo ini ndichatsanangura tafura nyowani pane yekutanga server yakavakirwa pane schema trips_mergetree_third uye inoshandisa Distributed injini.
CREATE TABLE trips_mergetree_x3
AS trips_mergetree_third
ENGINE = Distributed(perftest_3shards,
default,
trips_mergetree_third,
rand());Ini ndichabva ndakopa iyo data kubva kuMergeTree yakavakirwa tafura kune ese matatu maseva. Izvi zvinotevera zvakapedzwa mumaminitsi makumi matatu nemana nemasekonzi makumi mana nemana.
INSERT INTO trips_mergetree_x3
SELECT * FROM trips_mergetree;Mushure mekuvhiyiwa kuri pamusoro, ndakapa ClickHouse maminetsi gumi nemashanu kuti ibve padanho repamusoro rekuchengetedza. Madhairekitori edata akaguma ave 15 GB, 264 GB uye 34 GB zvakateerana pane imwe neimwe yemaseva matatu.
ClickHouse cluster performance evaluation
Izvo zvandakaona zvakatevera yaive nguva yekukurumidza yandakaona ichimhanyisa mubvunzo wega wega patafura kakawanda trips_mergetree_x3.
$ clickhouse-client --host=0.0.0.0Izvi zvinotevera zvakapedzwa mumasekonzi 2.449.
SELECT cab_type, count(*)
FROM trips_mergetree_x3
GROUP BY cab_type;Izvi zvinotevera zvakapedzwa mumasekonzi 0.691.
SELECT passenger_count,
avg(total_amount)
FROM trips_mergetree_x3
GROUP BY passenger_count;Izvi zvinotevera zvakapedzwa mumasekonzi 0.
SELECT passenger_count,
toYear(pickup_date) AS year,
count(*)
FROM trips_mergetree_x3
GROUP BY passenger_count,
year;Izvi zvinotevera zvakapedzwa mumasekonzi 0.983.
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;Kuenzanisa, ndakamhanya mibvunzo yakafanana paMergeTree-based tafura inogara pane yekutanga server.
Kuongororwa kwekuita kweimwe ClickHouse node
Izvo zvandakaona zvakatevera yaive nguva yekukurumidza yandakaona ichimhanyisa mubvunzo wega wega patafura kakawanda trips_mergetree_x3.
Izvi zvinotevera zvakapedzwa mumasekonzi 0.241.
SELECT cab_type, count(*)
FROM trips_mergetree
GROUP BY cab_type;Izvi zvinotevera zvakapedzwa mumasekonzi 0.826.
SELECT passenger_count,
avg(total_amount)
FROM trips_mergetree
GROUP BY passenger_count;Izvi zvinotevera zvakapedzwa mumasekonzi 1.209.
SELECT passenger_count,
toYear(pickup_date) AS year,
count(*)
FROM trips_mergetree
GROUP BY passenger_count,
year;Izvi zvinotevera zvakapedzwa mumasekonzi 1.781.
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;Kufungisisa pamusoro pezvabuda
Aka ndekekutanga kuti yemahara CPU-yakavakirwa dhatabhesi yakakwanisa kudarika GPU-yakavakirwa dhatabhesi mubvunzo dzangu. Iyo GPU-yakavakirwa dhatabhesi yakapfuura neyakadzokororwa maviri kubva ipapo, asi kuita kwakaunzwa neClickHouse pane imwe node kuchiri kunakidza.
Panguva imwecheteyo, paunenge uchiita Query 1 pane injini yakagoverwa, mutengo wepamusoro ndeye kurongeka kwehukuru hwepamusoro. Ndinovimba ndarasikirwa nechimwe chinhu mukutsvagisa kwangu kwechinyorwa ichi nekuti zvingave zvakanaka kuona nguva dzemibvunzo dzichidzika pandinowedzera dzimwe node kuboka. Nekudaro, zvakanaka kuti kana uchiita mimwe mibvunzo, kuita kwakawedzera nekaviri.
Zvingave zvakanaka kuona ClickHouse ichishanduka kusvika pakukwanisa kupatsanura kuchengetedza uye komputa kuti vakwanise kuyera vakazvimirira. HDFS rutsigiro, iyo yakawedzerwa gore rapfuura, inogona kunge iri nhanho kune izvi. Panyaya yekombuta, kana mubvunzo mumwe chete unogona kukwidziridzwa nekuwedzera mamwe ma node kuboka, saka ramangwana reiyi software rakajeka kwazvo.
Ndinokutendai nekutora nguva yekuverenga chinyorwa ichi. Ini ndinopa kubvunza, kuvaka, uye maitiro ekuvandudza masevhisi kune vatengi muNorth America neEurope. Kana uchida kukurukura kuti mazano angu angabatsira sei bhizinesi rako, ndapota ndibate neni kuburikidza .
Source: www.habr.com