#DISK ARCHIVE ARCHIVE#
#DISK ARCHIVE OFFLINE#

Datanodes are organized into racks of 10 machines (360 data drives), and interconnected via high-speed ethernet to form our storage cluster. Each of these are housed in specialized computers (we call them вЂњdatanodesвЂќ) that have 36 data drives (plus two operating systems drives) per machine.

#DISK ARCHIVE ARCHIVE#

Today, we have archived a little over 30 petabytes, and we add between 13 and 15 terabytes of content per day (web and television are the most voluminous).Д¬urrently, Internet Archive hosts about 20,000 individual disk drives.

In October of 2012, we held just over 10 petabytes of unique content.

So for numbers below, the amount of physical disk space (вЂњrawвЂќ storage) is typically twice the amount stated.ДЄs we have pursued our mission, the need for storing data has grown. We refer to this overall scheme as вЂњpaired storage.вЂќ Because of the dual-storage arrangement, when we talk about вЂњhow muchвЂќ data we store, we usually refer to what really matters to the patrons - the amount of unique compressed content in storage - that is, the amount prior to replication into paired-storage. Both of these storage locations (called вЂњprimaryвЂќ and вЂњsecondaryвЂќ) are immediately available to serve their copy of the content to patronsвЂ¦ and if one storage location becomes unavailable, the content remains available from the alternate storage location. This вЂњmirroringвЂќ of content is done both to minimize the likelihood of data loss or data corruption (due to unexpected harddrive or system failures) and to increase the efficiency of access to the content. Once a new item is created, automated systems quickly replicate that item across two distinct disk drives in separate servers that are (usually) in separate physical data centers. From a technical standpoint, items are stored in a well-defined structure within Linux directories. We often get questions related to вЂњHow much data does Internet Archive actually keep?вЂќ and вЂњHow do you store and preserve that knowledge?вЂќДЄll content uploaded to the Archive is stored in вЂњItems.вЂќ As with items in traditional libraries, Internet Archive items areВ structured to contain a single book, or movie, or music album - generally a single piece of knowledge that can be meaningfully cataloged and retrieved, along with descriptive information (metadata) that usually includes the title, creator (author), and other curatorial information about the content. Researchers will also want to visit TOSEC, the Old School Emulation Center collection, and the gathered collection of FTP Sites at the FTP Site Boneyeard.The mission of the Internet Archive is вЂњUniversal Access to All Knowledge.вЂќ The knowledge we archive is represented as digital data. Over time, these collections may find new iterations as such museum pieces and study aids, but for now they are gathered groups of information, awaiting the computer history equivalent of 'crate diggers' going through 'the stacks' to find precious forgotten history. The ideal situation would be a legion of curated displays and presentation of this data to an audience, or as fully-described datasets for the purposes of research and historical knowledge. Sometimes the files ran together on a bulletin board system, while others are collections of images disks or cassettes that were in the possession of one person.

This collection is meant to be a deep storage archive of these sets of files and data, fused together as originally acquired from efforts to preserve them. The unifying theme would only be that they were all on the same storage medium. Over time, this collection would sometimes resemble a pile, or a library, or an archive. Programs, textfiles, and later images, sound and moving image data would be collected in the course of computer ownership and maintenance.

#DISK ARCHIVE OFFLINE#

With the introduction of offline storage (in the form of tape and punch cards, later floppy disks, hard drives and cards), computer users began to create and acquire all manner of data to use with their machines.

Disk archive