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| computing:department:unix:file_storage [2013/10/28 14:11] – allan | computing:department:unix:file_storage [2016/02/02 13:52] (current) – [sshfs] allan | ||
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| - | <box 20% right right-clear red|More Information> | + | |
| - | {{indexmenu>: | + | |
| - | </ | + | |
| ====== Data storage on Unix ====== | ====== Data storage on Unix ====== | ||
| - | ===== Home directory storage and backups | + | ===== Home directories |
| Your home directory on the Unix cluster has a usage quota, to avoid too much space being taken by individual users. The standard quota is normally somewhere around 10GB. You can see your current usage and quota by visiting [[https:// | Your home directory on the Unix cluster has a usage quota, to avoid too much space being taken by individual users. The standard quota is normally somewhere around 10GB. You can see your current usage and quota by visiting [[https:// | ||
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| If you run into your quota, and after reviewing your file usage find that you still need more space, you can reply to the warning email to request a change from us. Please understand, however, that the amount of space available is limited. Your home directory is not intended for large research data sets, for which separate project-specific storage should be used. | If you run into your quota, and after reviewing your file usage find that you still need more space, you can reply to the warning email to request a change from us. Please understand, however, that the amount of space available is limited. Your home directory is not intended for large research data sets, for which separate project-specific storage should be used. | ||
| - | < | + | **Home directories should not be used for data-intensive |
| - | The home directories are backed up nightly. You can retrieve recently-deleted files from [[:computing:department:unix:backup|backup]] yourself. | + | The home directories are backed up nightly, and in addition filesystem " |
| - | ===== Project | + | ===== Shared project |
| - | If you need a shared area for your project where multiple people can develop or store code, we can create such an area and back it up for you. This is intended for small-scale usage; if you need to store large data sets then read under " | + | If you need a shared area for a group or project where multiple people can develop or store code, we can create such an area and back it up for you. These are made available under the ''/ |
| - | ===== Project Data storage ===== | + | ===== Research data storage ===== |
| - | Other file systems are provided for research or project-specific data, under the **/data** hierarchy. This storage space is **purchased by the research group**. It can take the form of simple single drives in linux workstations, | + | Other file systems are provided for research or project-specific data, under the **/data** hierarchy. This storage space is **purchased by the research group**. It can take the form of simple single drives in linux workstations |
| - | These file systems are usually named either after the research group group (for a server-based RAID volume), or with the name of the workstation which hosts it (for a simple data drive), and contain further directories organized by user or by project. These areas should be used for large data sets and storage for local processes. Note that these areas are provided by the // | + | These file systems are usually named either after the research group group (for a fileserver |
| - | **Warning** these areas are generally **not backed up**, other than by special arrangement. If you have a large amount of data which requires backup, you should talk to us about the available options. | + | ===== Backups ===== |
| - | ===== " | + | <note warning> |
| + | * Unix **home directories** are backed up daily. | ||
| + | * Older files may need to be recovered from snapshots or from tape. Complete tape backups are currently made monthly and retained for 6 months. | ||
| - | You can find shared temporary filesystems under **/scratch**, which may be used for scratch space for local processes. Don't place any files you may want to keep long-term here - files which have not been accessed for 30 days or more may be purged from this area, or when a workstation is updated. | + | |
| + | * Data areas on our ZFS storage have nightly // | ||
| + | * Linux RAID storage does not have snapshots. | ||
| + | * If you have critical research data which requires backup, this can be arranged for moderate data sizes (eg < 10TB). Please talk to us about the options. | ||
| + | * Local data drives in workstations are **never** backed up. | ||
| + | </ | ||
| - | Your scratch directory on the local system is always named **/ | + | ===== Local " |
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| + | " | ||
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| + | Your scratch directory on the local system is always named **/ | ||
| < | < | ||
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| - | ===== Remote access to file systems | + | ===== Remote access to data ===== |
| + | |||
| + | The security model of Unix NFS is too weak to permit exporting it to any systems | ||
| + | |||
| + | ==== globus ==== | ||
| + | |||
| + | Please see [[: | ||
| + | |||
| + | ==== sshfs ==== | ||
| - | You can use //fuse// (the userspace filesystem driver) to mount any remote filesystem which you have ssh access to. You can use this to access files from other systems | + | You can use //fuse// (the userspace filesystem driver) to mount any remote filesystem which you have ssh access to. Although this is not a high-performance solution, you can use this to access files from non-Physics linux systems. For example: |
| mkdir ~/mnt #create a place to put it, can be called anything you want. | mkdir ~/mnt #create a place to put it, can be called anything you want. | ||