StevenACoffman

Mistakes to Avoid: Docker Antipatterns

Whichever route you take to implementing containers, you’ll want to steer clear of common pitfalls that can undermine the efficiency of your Docker stack.

Don’t run too many processes inside a single container

The beauty of containers—and an advantage of containers over virtual machines—is that it is easy to make multiple containers interact with one another in order to compose a complete application. There is no need to run a full application inside a single container. Instead, break your application down as much as possible into discrete services, and distribute services across multiple containers. This maximizes flexibility and reliability.

Don’t install operating systems inside Docker containers

It is possible to install a complete Linux operating system inside a container. In most cases, however, this is not necessary. If your goal is to host just a single application or part of an application in the container, you need to install only the essential

devhero

Byobu is a suite of enhancements to tmux, as a command line
tool providing live system status, dynamic window management,
and some convenient keybindings:

  F1                             * Used by X11 *
    Shift-F1                     Display this help
  F2                             Create a new window
    Shift-F2                     Create a horizontal split
    Ctrl-F2                      Create a vertical split
    Ctrl-Shift-F2                Create a new session

inhumantsar

KEYBINDINGS
       byobu keybindings can be user defined in /usr/share/byobu/keybindings/ (or within .screenrc if byobu-export was used). The  common  key  bindings
       are:

       F2 - Create a new window

       F3 - Move to previous window

       F4 - Move to next window

Slach

FROM yandex/clickhouse-server:${CLICKHOUSE_VERSION:-latest}

USER root
ARG UBUNTU_NAME=focal
ARG UBUNTU_VERSION=20.04

RUN echo "Begin ODBC install" && \
    #MySQL repo
    wget -qO- "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0xa4a9406876fcbd3c456770c88c718d3b5072e1f5" | apt-key add - && \
    echo "deb http://repo.mysql.com/apt/ubuntu/ ${UBUNTU_NAME} mysql-8.0" >/etc/apt/sources.list.d/mysql-oracle.list && \

den-crane

drop table z; 
drop table mvz;
create table z(d Date, u String) Engine=MergeTree partition by tuple() order by tuple();
CREATE MATERIALIZED VIEW mvz ENGINE = AggregatingMergeTree(d, (d), 8192) as select d, uniqState(u) as us from z group by d
insert into z select today()-number%571, concat('usr',toString(rand()%664579)) from numbers(100000000);
optimize table mvz final;
optimize table z final;

select  (uniqMerge(us)) as unique from mvz group by d order by d;
571 rows in set. Elapsed: 0.300 sec.

den-crane

DROP TABLE IF EXISTS states_raw;
DROP TABLE IF EXISTS final_states_by_day;
DROP TABLE IF EXISTS final_states_by_day_mv;

CREATE TABLE states_raw
(
    process String,
    state String,
    stateint Int64,
    statevalue Float64,

den-crane

ClickHouse server version 18.14.12 revision 54409.


create table data(K Int64, V String) engine=MergeTree order by K;
insert into data select number, toString(number) from numbers(100,100000000);
optimize table data final;
create table buffer(K Int64, V String) engine=Memory;
insert into buffer select number, toString(number) from numbers(0,1000);

den-crane

DROP TABLE IF EXISTS requests;

CREATE TABLE requests (
  request_date Date, 
  request_time DateTime, 
  response_time Int, 
  request_uri String) 
ENGINE  = MergeTree(request_date, (request_time, request_uri), 8192);

den-crane

CREATE TABLE states_raw(
    d date,
    uid UInt64,
    first_name String,
    last_name String,
    modification_timestamp_mcs DateTime64(3) default now64(3)
) ENGINE = Null;

CREATE TABLE final_states_by_month(
    d date,

InKolev

Building Kafka from the Hardware - up

• Higher Message Retention ? - Increase disk size
• Higher Message Throughput ? - Increase network capacity
• Higher Producer Performance ? - Increase Disk I/O speed
• Higher Consumer Performance ? - Increase Memory

Critical Configurations (Consumer)

• queued.min.messages
• fetch.wait.max.ms
• socket.blocking.max.ms