Hi HDFS users, I am getting software from a vendor that used HDFS. Since I know nothing about HDFS aside from the documentation page, can someone kindly answer a few details?
1. It looks to be a user-space clustering file system, which means root access is never needed during installation and on-going usage, right? 2. It looks to have a software raid scheme, and the default is 3 copies, so if I have 3 boxes with 500gb disks each, the usable space is just 500gb right? 3. If I just have 1 box of 500gb disk, what is the usable space? 4. Does the HDFS show up in Linux OS as multiple physical files? Of what size? If I change a file of 1 byte inside HDFS, I assume the entire physical file on Linux OS is changed right? This will really mess with tape backups... Thanks, Clayton _______________________________________________ This e-mail may contain information that is confidential, privileged or otherwise protected from disclosure. If you are not an intended recipient of this e-mail, do not duplicate or redistribute it by any means. Please delete it and any attachments and notify the sender that you have received it in error. Unless specifically indicated, this e-mail is not an offer to buy or sell or a solicitation to buy or sell any securities, investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Barclays. Any views or opinions presented are solely those of the author and do not necessarily represent those of Barclays. This e-mail is subject to terms available at the following link: www.barcap.com/emaildisclaimer. By messaging with Barclays you consent to the foregoing. Barclays Capital is the investment banking division of Barclays Bank PLC, a company registered in England (number 1026167) with its registered office at 1 Churchill Place, London, E14 5HP. This email may relate to or be sent from other members of the Barclays Group. _______________________________________________
