amosbird

RFC: Selective Replication for ReplicatedMergeTree

Status: Draft Based on: #45766, PR #58132

Summary

Extend ReplicatedMergeTree so that each replica is responsible for an automatically selected subset of partitions. Replicas and shards are unified — no Distributed table needed. Partition key doubles as sharding key.

Motivation

amosbird

```
0x89996d0
inline_memcpy(void*, void const*, unsigned long)
./build_docker/./base/glibc-compatibility/memcpy/memcpy.h:188
memcpy
./build_docker/./base/glibc-compatibility/memcpy/memcpy.cpp:5
0x13c74c1a
void DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul>::push_back<unsigned long const&>(unsigned long const&)
./build_docker/./src/Common/PODArray.h:436
DB::ColumnString::insert(DB::Field const&)

amosbird

static void initRowsBeforeLimit(IOutputFormat * output_format)
{
    RowsBeforeLimitCounterPtr rows_before_limit_at_least;

    /// TODO: add setRowsBeforeLimitCounter as virtual method to IProcessor.
    std::vector<LimitTransform *> limits;
    std::vector<PartialSortingTransform *> partial_sortings;
    std::vector<RemoteSource *> remote_sources;

    std::unordered_set<IProcessor *> visited;

amosbird

var direct = 'DIRECT';
var http_proxy = 'PROXY 127.0.0.1:12639';

var gfwed_list = [
        "oa.com",
        "woa.com",
        "oa.tencent.com",
];

var gfwed = {};

amosbird

FROM centos:6

RUN curl https://www.getpagespeed.com/files/centos6-eol.repo --output /etc/yum.repos.d/CentOS-Base.repo

RUN yum update -y && \

    yum install -y \

        byacc \

amosbird

I have an vpn tunnel which generates this device

22: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1390 qdisc fq_codel state UNKNOWN group default qlen 500

    link/none

    inet 172.19.60.64/32 scope global tun0

       valid_lft forever preferred_lft forever

amosbird

#!/usr/bin/env bash

while [[ 1 ]]; do
    nd=$(sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL | grep "Firmware state: Online, Spun Up" | wc -l)

    if [[ nd -ne <YOU DISK NUM> ]];
    then
        echo "check it using sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL" | mail -s "$HOSTNAME has disk failure!!" <YOU EMAIL ADDRESS>
        sleep 3600
    fi

amosbird

#SingleInstance force

Loop, %0%  ; For each parameter:
  {
    param := %A_Index%  ; Fetch the contents of the variable whose name is contained in A_Index.
    params .= A_ralt . param
  }
ShellExecute := A_IsUnicode ? "shell32\ShellExecute":"shell32\ShellExecuteA"
 
if not A_IsAdmin

amosbird

 ❯ xinput --list-props 10                                                                    (53s 637ms)
Device 'Lite-On Technology Corp. ThinkPad USB Keyboard with TrackPoint':
        Device Enabled (138):   1
        Coordinate Transformation Matrix (140): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Accel Speed (276):     1.000000
        libinput Accel Speed Default (277):     0.000000
        libinput Accel Profiles Available (278):        1, 1
        libinput Accel Profile Enabled (279):   1, 0
        libinput Accel Profile Enabled Default (280):   1, 0
        libinput Natural Scrolling Enabled (281):       0

amosbird

❯ cat /usr/share/X11/xkb/symbols/altwin
// Meta is mapped to second level of Alt keys.
partial modifier_keys
xkb_symbols "meta_alt" {
    key <LALT> { [ Alt_L, Meta_L ] };
    key <RALT> { type[Group1] = "TWO_LEVEL",
                 symbols[Group1] = [ Hyper_R ] };
    modifier_map Mod1 { Alt_L, Alt_R, Meta_L, Meta_R };
    modifier_map Mod3 { Hyper_R };
//  modifier_map Mod4 {};