![]() ![]() One can buy media from pretty much all of those companies too. Overland Storage, Qualstar, Tandberg and other system integrators. Today you can buy LTO Ultrium technology from HPE as well as IBM, Quantum, Dell, Oracle, Spectra, One of the primary considerations has to be how easy it would be to migrate to a new supplier if something happened to an incumbent provider in the future. That’s almost $150,000 lower media costs in absolute terms and 80% cheaper in cost per terabyte values on the media alone. If these differentials are broadly the same for future generations, the difference in media expenditure in the future is going to be enormous! Tape’s Total Cost of Ownership ratio will be many times lower than that for ODA. In 5 years, if we assume LTO-9 is available, a customer would need almost 900 x 6 TB ODA disks versus just 215 x 25 TB LTO-9’s! In cost per TB terms, LTO-7 is 60% cheaper. A 3.3 TB ODA disk costs around $200, whereas an LTO-7 tape (6.25 TB) is around $150 per cartridge. ![]() Today, that 1 PB will need about 300 x 3.3 TB disks versus 170 LTO-7 tapes. So a 1 Petabyte archive today will be around 5.5 PB in five years time. Meanwhile, what does the roadmap for ODA look like?Īccording to Sony ODA will reach 6 TB in its third generation, by which time, LTO will be well on the way to 120 TB per media unit (compressed).ĭata is increasing at 40% per year and 90% of it is unstructured (IDC). So not only is this tape management ‘overhead’ not as great as people might think, LTO will also accommodate the vast amounts of digital data that will be created moving forward. LTO-10 is slated to be 48 TB native per cartridge and is probably less than a decade away. It’s true that using tape, data would need to be migrated between tape generations at some point in the future, more frequently than perhaps would be required with ODA.īut each time this happens, fewer tapes will be needed. So does that mean ODA is a better choice than tape for preserving data for decades to come? Not necessarily. In absolute terms, ODA is rated for even longer retention periods - up to fifty years according to Sony. LTO Ultrium is rated for at least 30 years archival warranty life and a number of suppliers, including HPE, have published data from accelerated ageing tests to demonstrate the validity of these claims. ![]() Tape is a proven, secure and reliable medium for the long term preservation of data. One of the compelling benefits of tape technology is its durability. Today, we’re taking a look at LTO tape technology in comparison with Sony’s Optical Disk Archive solution for long term archiving. However, the business value of much of this data means it still has to be retained and readily available over extended lengths of time. Write_archive(const char *outname, const char **filename)Īrchive_write_set_format_pax_restricted(a) // Note 1Īrchive_entry_set_pathname(entry, *filename) Īrchive_entry_set_size(entry, st.LTO tape versus Optical Disk Archiving (ODA) for long term data protection and retentionĮighty percent of your data is rarely or never accessed after 90 days of creation. During the "Extract" example from the same website, it appears everything is contained within the "archive_entry" struct but there doesn't appear to be a counterpart for Create. But I can't find any examples of how to actually create an archive from a directory path. LibArchive has an example of how to create an archive from a flat list of files (shown below). tar archive of a directory, since it is installed on my remote compute instance. I've never used LibArchive before and am trying to use it to create a. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |