Introduction In our Faculty, different types of data storage are offered: Storage class Description Risk for data loss Home directories Small (several GB), reliable, backed up storage for individuals low Network shares Larger (1-200 TB), reliable, backed up storage for individuals or groups low Local storage Not backed up storage on desktop computers and cluster nodes, likely to be lost in case of a hardware problem or when the machine gets reinstalled high Home directories Your Science login comes with a home directory of 5GB at no costs....

If you use C&CZ storage, you now have the new option to access these via network protocols other than SMB (for Windows and macOS) and NFS (for Linux), namely: sftp: a secure variant of FTP https: a (read-only) view of the share for browsers webdavs: a (read-write) view of the share for browsers and webdav clients s3: a read/write view using the Simple Storage Service (S3) Each of these may be active at the same time, and optionally can have an end date, so you can “open up” a share for writes from another organisation which then automatically “closes” at the end date....

C&CZ heeft een opslagoptie ontwikkeld gebaseerd op ZFS. Deze pagina behandelt de technische details en welke mogelijkheden er zijn. Dit om je te helpen beslissen of dit iets voor jouw organisatie is. Elke data opslag die we uitdelen noemen we een “volume”. Voor deze ZFS volumes geldt: Grootte: De volume grootte kan zo groot zijn als nodig; de enige imitatie is hoeveel disken we in een machine kunnen stoppen. Nu (2024+) kunnen we machines kopen die ongeveer 140-200 TB aan data kunnen bevatten....

You might have received an email that your personal or group network disk is almost full. This articles describes some tools to identify large files/directories and cleanup disk space. Finding large files / directories with WinDirStat (graphical, Windows) WinDirStat is a disk cleanup tool for Windows that provides a visual representation of disk space usage. It helps you to quickly identify and understand which files and folders are consuming the most space....

Your personal quota only determine the amount of disk space your own data may occupy and the number of files and folders you may have on your Windows U:\ disk or Linux home directory. Quotas may be active on other disks as well, however not all disks have quotas. The mail servers also use quotas to limit the disk space of each user’s mailbox. Windows On Windows desktops where the home directory is available as U: or H: disk right click on the disk, then choose Properties to view the amounts of used and available personal disk space in kbytes....

Network shares with ZFS as file system have the ability (which C&CZ switches on by default) to make snapshots. A snapshot is a read-only copy of the share, made at a specific point in time. Such snapshots allow you to find previous versions of your files. On most shares, snapshots go back 45 days. After that period they are removed. Tip If you remove a file, you still have the ability to retrieve - up to 45 days - different versions....

What path to mount? The storage page describes the paths for your home directory and network shares. Once you know what network share to mount, follow the steps for your operating system below. Info A VPN connection is required when accessing these paths from outside of the RU network. If you have trouble connecting to a network share after following the steps below, do not hessitate to contact us. We’ll be happy to assist you!...

Shared temporary storage It sometimes happens that you want to send one or more large files to someone within the faculty, e-mail is not suitable for this. To make this easier, the network disk temp is available. You can temporarily store large files here. These can then be copied from this location by someone else. C&CZ systems Path Instructions Microsoft Windows \\temp-srv.science.ru.nl\temp connect network share Linux /vol/temp Own systeem Path Instructions Microsoft Windows \\temp-srv....

Just before 23:09 quite a lot of ceph storage nodes became unreachable. This seems to be due to one of the redundant links between two datacenter locations failing for about 4 seconds. This triggered a whole slew of ceph osd processes being killed off and not starting again. A generic configuration change made for all our servers generated an extra interface, which confused some of the osd processes (depending on interface ordering) when starting up....

Since the end of 2019, C&CZ offers Ceph as a choice for data storage, next to the traditional RAID storage on individual fileservers. Because demand for Ceph storage is rising, the Ceph storage has been upgraded from 1.8 PiB to 2.8 PiB gross. With this upgrade, storage servers have been placed in a central RU datacenter, so the Ceph storage is now distributed over three datacenters. If you want to try whether Ceph suits you, please contact C&CZ....