at TACC. The first Lonestar system was built by Dell and integrated by Cray, using Dell PowerEdge 1750 servers and Myrinet interconnects, with a peak performance of 3672 gigaFlops. An upgrade in 2004 increased the number of processors to 1024 and the peak rate of 6338 gigaflops. The second iteration (Lonestar 2) in 2006 was deployed with Dell PowerEdge 1855 servers and Infiniband. (1300 processors, 2000 gigabytes memory, peak performance 8320 gigaflops.) Later that year, the cluster's third iteration was built from Dell PowerEdge 1955 servers; it was composed of 5200 processors and 10.4 TB memory. Lonestar 3 entered the Top500 list in November 2006 as the 12th fastest supercomputer, with 55.5 TFlops peak. In April 2011, TACC announced another upgrade of the Lonestar cluster. The $12 million Lonestar 4 cluster replaced its predecessor with 1,888 Dell M610 PowerEdge blade servers, each with two six-core Intel Xeon 5600 processors (22,656 total cores). The system storage includes a 1000TB parallel (SCRATCH) Lustre file system, and 276TB of local compute-node disk space (146GB/node). Lonestar also provides access to five large memory (1TB) nodes, and eight nodes containing two NVIDIA GPU's, giving users access to high-throughput computing and remote visualization capabilities respectively. Lonestar 4 entered the Top500 list in June 2011 as the 28th fastest supercomputer, with 301.8 TFlops peak. The Top500 rankings of various iterations of the Lonestar cluster are listed in TACC's submissions to the Top500. Ranch TACC's long-term mass storage solution is an Oracle StorageTek Modular Library System, named Ranch. Ranch utilizes Oracle's Sun Storage Archive Manager Filesystem (SAM-FS) for migrating files to/from a tape archival system with a current offline storage capacity of 40 PB. Ranch's disk cache is built on Oracle's Sun ST6540 and DataDirect Networks 9550 disk arrays containing approximately 110 TB of usable spinning disk storage. These disk arrays are controlled by an Oracle Sun x4600 SAM-FS Metadata server which has 16 CPUs and 32 GB of RAM. Corral Deployed in April 2009 by the Texas Advanced Computing Center to support data-centric science at the University of Texas, Corral consists of 6 Petabytes of online disk and a number of servers providing high-performance storage for all types of digital data. It supports MySQL and Postgres databases, high-performance parallel file system, and web-based access, and other network protocols for storage and retrieval of data to and from sophisticated instruments, HPC simulations, and visualization laboratories. Visualization resources To