Lexer – Reason (Gabriel Ananda Remix) 13m
The Micronaut – Circle (Mollono.Bass Remix)
tipos de atrasos mais frequentes:
please give some votes up to the author! 😉
Hadoop: We have multiple clusters storing over 500 PB divided in four groups (real time, processing, data warehouse and cold storage). Our biggest cluster is over 10k nodes. We run 150k applications and launch 130M containers per day.
Manhattan(the backend for Tweets, Direct Messages, Twitter accounts, and more): We run several clusters for different use cases such as large multi tenant, smaller for non common, read only, and read/write for heavy write/heavy read traffic patterns. The read/only cluster handles 10s of millions QPS whereas a read/write cluster handles millions of QPS. The highest performance cluster, our observability cluster, which ingests in every datacenter, handles over tens of million writes.
Graph: Our legacy Gizzard/MySQL based sharded cluster for storing our graphs. Flock, our social graph, can manage peaks over tens of million QPS, averaging our MySQL servers to 30k – 45k QPS.
Blobstore: Our image, video and large file store where we store hundreds of billions objects.
Cache: Our Redis and Memcache clusters: caching our users, timelines, tweets and more.
SQL: This includes MySQL, PostgreSQL and Vertica. MySQL/PosgreSQL are used where we need strong consistency, managing ads campaign, ads exchange as well as internal tools. Vertica is a column store often used as a backend for Tableau supporting sales and user organisations.
Edit /etc/mdadm/mdadm.conf and, after # definitions of existing MD arrays add
ARRAY <ignore> devices=/dev/sda
This is, for what I’v read about, the two main things that we need to have updated…
Check them trought uname -r and dmesg | grep microcode
[[email protected] www]# systemctl status microcode -l ● microcode.service - Load CPU microcode update Loaded: loaded (/usr/lib/systemd/system/microcode.service; enabled; vendor preset: enabled) Active: inactive (dead) since Fri 2018-01-05 17:43:08 CET; 1 weeks 6 days ago Process: 692 ExecStart=/usr/bin/bash -c grep -l GenuineIntel /proc/cpuinfo | xargs grep -l -E "model[[:space:]]*: 79$" > /dev/null || echo 1 > /sys/devices/system/cpu/microcode/reload (code=exited, status=0/SUCCESS) Main PID: 692 (code=exited, status=0/SUCCESS) Jan 05 17:43:08 sd-56969 systemd: Starting Load CPU microcode update... Jan 05 17:43:08 sd-56969 systemd: Started Load CPU microcode update.