CCT395, Week 12 Storage, Grid Computing, Review This presentation is licensed under Creative Commons Attribution License, v. 3.0. To view a copy of this.

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Presentation transcript:

CCT395, Week 12 Storage, Grid Computing, Review This presentation is licensed under Creative Commons Attribution License, v To view a copy of this license, visit This presentation incorporates images from the Crystal Clear icon collection by Everaldo Coelho, available under LGPL from Yuri Takhteyev University of Toronto November 24, 2010

Potential Problems File corruption interrupted write other reasons Disk corruption hardware breaks Large scale hardware loss e.g., fire

Yoda your laptop

Backup mysqldump mysqldump --user=kenobio --password menagerie > menagerie.sql mysql> source menagerie.sql hot backup replication off-site copies

RAID combining disks for reliability and/or performance

No RAID A1A2B1B2

RAID-0 A1B1C1D1 A2B2C2D2 can be faster, no gain in reliability

RAID-1 A1A2B1B2 faster reading, slower writing can withstand losing one disk

RAID >2 A1B1C1D1 A2B2C2D2 ApBpCpDp

RAID >2 A1B1C1D1 A2B2C2D2 reasonable reliability, not too wasteful ApBpCpDp

image source:

Hosting Managed server you get an account (like on yoda) Private server you get your own computer Virtual private server (VPS) you get a virtual computer

Yoda yod a VPS

Yoda yod a VPS

Yoda yod a Grid Computing can provide virtual servers or other services

Examples Amazon Web Services virtual storage, servers, db Google's AppEngine Google-specific API

Questions?

Mississauga Airlines Seat Seat_Class Flight PassengerAirport

Who is flying to LAX in the aisle? select passenger.last_name, passenger.first_name from passenger join _______ using __________ join _______ on _____________ where _____________=”aisle” and _____________=”LAX”;

Which seat class has most passengers? select seat_class.name from ________________________ join seat_class on __________________________ ____________ by _____________ _____________________________