Hello! I have been messing around with FreeNAS for a few months now. It's a solid product and has been working fairly well for me. I have had a recent issue with the flash drives I was using to run the OS on. The problem involved me losing all access VIA the web and console locking up. With an error message about the Flash Drive being disconnected. This prompted me to reinstall NAS on different flash drives that are USB 2.0 and a different brand of flash drives. During the install, I wondered if my setup was perhaps not the best and I may have misunderstood some critical things about a proper setup. My setup is to have two FreeNAS machines replicate each other data stores. Each FreeNAS has x5 4TB hard drives, Intel Server Class NIC, and x2 8GB of ECC DDR4 RAM, each FreeNAS connects to the file server using iSCSI My configuration is as follows...
FreeNAS1 at office 1
FreenNAS1 has a 10TB extent and is mapped VIA iSCSI
Snapshot is performed twice a day with a retention period of six weeks
Snapshots are replicated to FreeNAS2 under the ZFS of Freenas2\Backup\Freenas1
Weekly scrubs are performed
FreeNAS 2 at office 2
FreenNAS1 has a 5TB extent and is mapped VIA iSCSI
Snapshot is performed twice a day with a retention period of six weeks
Snapshots are replicated to FreeNAS1 under the ZFS of Freenas1\Backup\Freenas2
Weekly scrubs are performed
My questions is since I am replicating extent and snapshots to FreeNAS devices will there a be a chance of overwriting the data contained on the Pull? I tried to account for overhead (about a 1TB-2TB of unused space on the entire volumes. But I noticed the extents are 10TB + 5TB so 15TB total being used, are the snapshots stored on the volumes and thus further decreasing the amount of storage? Please let me know if you need further clarification on my question, and thank you for taking the time to answer it. :)
--Matt
FreeNAS1 at office 1
FreenNAS1 has a 10TB extent and is mapped VIA iSCSI
Snapshot is performed twice a day with a retention period of six weeks
Snapshots are replicated to FreeNAS2 under the ZFS of Freenas2\Backup\Freenas1
Weekly scrubs are performed
FreeNAS 2 at office 2
FreenNAS1 has a 5TB extent and is mapped VIA iSCSI
Snapshot is performed twice a day with a retention period of six weeks
Snapshots are replicated to FreeNAS1 under the ZFS of Freenas1\Backup\Freenas2
Weekly scrubs are performed
My questions is since I am replicating extent and snapshots to FreeNAS devices will there a be a chance of overwriting the data contained on the Pull? I tried to account for overhead (about a 1TB-2TB of unused space on the entire volumes. But I noticed the extents are 10TB + 5TB so 15TB total being used, are the snapshots stored on the volumes and thus further decreasing the amount of storage? Please let me know if you need further clarification on my question, and thank you for taking the time to answer it. :)
--Matt