An Analysis of the Reliability of a Software Failure-Safe Array in the Organization of Long-Term Storage of Radio Interferometry Data with Ultra-Long Bases

摘要

A significant increase in the recording speed of very long baseline radio interferometry (VLBI) data and, accordingly, their volume (on the order of several hundred terabytes) requires reliable storage of these data for the possibility of repeated processing. An array of disk drives with redundancy can serve as one of the options for a reliable fault-tolerant long-term storage system for VLBI data (RAID is Redundant Array of Independent Disks). This paper presents the results of a study of the reliability of RAID software in the implementation of the ZFS file system (Zettabyte File System) in the raidz and raidz2 variants (analogs of RAID5 and RAID6) of the VLBI data storage system using the example of standard server equipment, and recommendations for creating such a system for long-term storage of this data in the correlation processing center of the RAS.