Diskruimte

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Revision as of 13:35, 9 July 2018 by Petervc (talk | contribs) ([Netwerk schijven][Network shares])
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The diskspace on C&CZ servers can be used from all kind of C&CZ servers and personal computers, but also from other PCs or even from home with WinSCP or VPN. Almost all disks that are managed by C&CZ, are being backupped regularly, in order to be able to restore data in case of small or large calamities.

Home directories

Every user with a Science login has or is entitled to an amount of disc space of a few Gigabytes on a server. This disc space is called the "home-directory" on Unix/Linux computers and the "H- or U-drive" on Windows-computers. The location of this homedirectory (which server) can be viewed on the Do-It-Yourself website.

Naming

Username guest204
SMB (Windows/...) name \\home1.science.ru.nl\guest204

or
\\home2.science.ru.nl\guest204
check on DIY

URL (Apple/Linux/Android/...) name smb://home1.science.ru.nl/guest204

or
smb://home2.science.ru.nl/guest204
check on DIY

NFS (C&CZ beheerd Linux) name /home/guest204

Access rights

Long ago the (Unix) home directory of a user, except for a few protected areas, was readable for all users of the server. Today the home directory of a user can be accessed by the user himself. The user can change the access rights. C&CZ checks for home directories that are writable by other users.

Network shares

Diskspace for groups/institutions/projects: there are a few RAID arrays with partitions that can be rented for a period of 3 years. The price for new discs or a new 3 year extension of an older disc is per July 2018 for FNWI departments:

size incl. backup without backup
ca. 200 GB € 40 per year € 10 per year
ca. 400 GB € 80 per year € 20 per year

Although even the cheapest version is much more expensive than buying 1 disk for 1 PC, it often makes sense, because of the reliability (redundant disks, backup, support contract) and security (stable server). One or more folders on such a partition can be mapped as a network drive on Windows PCs or NFS-mounted on Unix/Linux hosts. The ability to read and/or write files on these folders can be limited to a group of logins.
C&CZ has bought warranty for these RAID arrays and has spares on site, so a failure can be resolved quite fast. Because it is a RAID-array, the failure of 1 single disk will not give a disruption of service for users. The partitions are backed up (daily and incremental). Even in the case when the whole computer room is lost, data can (eventually) be restored.

Naming

Volume name sharename
SMB (Windows/..) name \\sharename-srv.science.ru.nl\sharename
URL (Apple/Linux/Android/...) name smb://sharename-srv.science.ru.nl/sharename
NFS (C&CZ-beheerd Linux) name /vol/sharename

Access rights

Most of the shared disks can be read and written by a specific group of users. The owners of this group can administer on the Do-It-Yourself website which accounts are a member of this group.

Temporary shared diskspace

Every now and then you want to send one or more large files (more than a few tens of MBs) to someone else within the Faculty, mail is unsuited for those large files. To make this easy, one can use a network share, where one can store large files temporarily in order to have someone else copy the files from this location. Note that this is explicitly meant for temporary storage, we do not make backups of this share, every day we remove files older than 21 days old.

This share can also be used to store temporary files only readable for yourself by using a different name for the share. Note that also in this case, old files will be removed.

Please create a subdirectory with your name first, and put your files in that directory.

For files totaling less than 250GB, also Surfdrive is an alternative.

Naming

Volume name temp
SMB (Windows/..) name \\temp-srv.science.ru.nl\share

or
\\temp-srv.science.ru.nl\onlyme

URL (Apple/Linux/Android/...) name smb://temp-srv.science.ru.nl/share

or
smb://temp-srv.science.ru.nl/onlyme

NFS (C&CZ-beheerd Linux) name /vol/temp

Access rights

  • Readable by all users: share
  • Only readable for the owner: onlyme

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