First, NFS does not provide cache coherency, so if you need that, you must look elsewhere. What NFS specifies is a weaker model called close-to-open consistency. Meaning that when a file is closed, any dirty data are flushed to the server. Conversely, when a file is opened, an attribute check is performed, meaning that if … Read more
I know of a few GlusterFS installments being used in production. You may want to look at some of the Scalable Informatics products if you want a commercially supported system. The GlusterFS team also had a booth at Supercomputing 09 where they demoed their systems. I think it’s by no means a “mature” technology, but … Read more
Why yes, it is possible to build an active/passive ZFS-based cluster using shared DAS and multipath SAS. Details at: https://github.com/ewwhite/zfs-ha/wiki The key to this high-availability storage design is a shared SAS-attached storage enclosure, or JBOD. While it’s not shared-nothing, this can be a useful way of bringing higher availability to a storage setup that can … Read more
I’ve found the answer myself. The problem was that I didn’t use the option allow_other. sshfs -o allow_other -o kernel_cache -o auto_cache -o reconnect \ -o compression=no -o cache_timeout=600 -o ServerAliveInterval=15 \ xxx@yyy.yyy.yyy.yyy:/mnt/content /home/xxx/path_to/content To use this option you have to set the option user_allow_other in /etc/fuse.conf. When I did this I had another problem. … Read more