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Total Cost of Ownership Analysis - Mosaic …

Total cost of Ownership Analysis Abstract A Total cost of Ownership (TCO) Analysis can measure the cost of acquiring and operating a new technology solution against a current installation. In the late 1990s, Gartner Group estimated the cost of operating a unit of primary storage could be five or more times the initial cost of acquisition, which highlighted the importance of an accurate TCO Analysis for enterprise storage buying decisions. The cost of operating secondary storage for data protection also dwarfs the initial acquisition price by three to four times. This white paper identifies the components required for an accurate TCO Analysis . Furthermore, three data protection scenarios will contrast the Total cost of Ownership for a tape backup solution with avamar Axion, the industry's most efficient disk-based data protection solution: Case 1: Small Enterprise ( of primary data).

©Avamar Technologies, Inc. April 2005 Version 1.1 4 4 Tape backup solutions create multiple redundant copies of primary data due to the inherent limitations of tape as a serial medium and the need to increase the

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Transcription of Total Cost of Ownership Analysis - Mosaic …

1 Total cost of Ownership Analysis Abstract A Total cost of Ownership (TCO) Analysis can measure the cost of acquiring and operating a new technology solution against a current installation. In the late 1990s, Gartner Group estimated the cost of operating a unit of primary storage could be five or more times the initial cost of acquisition, which highlighted the importance of an accurate TCO Analysis for enterprise storage buying decisions. The cost of operating secondary storage for data protection also dwarfs the initial acquisition price by three to four times. This white paper identifies the components required for an accurate TCO Analysis . Furthermore, three data protection scenarios will contrast the Total cost of Ownership for a tape backup solution with avamar Axion, the industry's most efficient disk-based data protection solution: Case 1: Small Enterprise ( of primary data).

2 Case 2: Medium Enterprise (10TB of primary data). Case 3: Large Enterprise (50TB of primary data). In addition to this white paper, avamar has developed a tool for determining the TCO for tape versus disk-based backup for a specific environment. Please contact your avamar representative for an Analysis tailored to your environment. 22. avamar Technologies, Inc. April 2005 Version Overview When considering a disk-based data protection solution, it is important to include the following cost factors in a TCO Analysis : Acquisition of new hardware and software Annual hardware and software maintenance Operational media Staff administration Network communications (especially wide area network usage). Where offsite data storage is a consideration, the Analysis should include the following cost elements, when applicable: Offsite vaulting Disaster recovery service (second site hardware, software and staff).

3 Additional media requirements Disaster recovery tests or reviews Network communications When comparing a disk-based data protection solution to a tape-based solution, the value of improved restore times and increased reliability can be substantial. Enterprises continue to pay hidden costs for lost productivity due to long restore times or worse, the cost of reconstructing data for restores abandoned or never initiated due to the limitations of tape backup. Annual data protection costs range from $30-$300/GB, while data reconstruction costs are typically estimated to be much higher, in the range of $900/MB. In some environments, the need for regular restores necessitates expensive layers of redundancy that can quickly inflate the Total cost of data protection for an enterprise. A separate means to evaluate the value of fast restore apart from other cost considerations is outlined later in this white paper.

4 A Market View According to a recent study conducted by The Taneja Group, many enterprise customers do not calculate their actual data protection costs or their actual success rate in performing backup and restores. Traditional data backup systems cost up to $100/GB per year, according to avamar studies. Using a more conservative cost estimate of $60-$80/GB per year, this white paper compares an average market view cost of Ownership for tape solutions versus avamar Axion, the industry's most efficient disk-based data protection solution, for three business cases: a small, medium and large enterprise. avamar Axion provides customers with the value of backup, remote replication and suffecient communications necessary to accomplish remote replication for the cost of local tape backup alone 33.

5 avamar Technologies, Inc. April 2005 Version Market Assumptions Tape backup solutions create multiple redundant copies of primary data due to the inherent limitations of tape as a serial medium and the need to increase the reliability of data restores. Most enterprises back up all data in any particular server once per week, although some enterprises perform this process more frequently. This backup is called a full, and it contains a complete copy of all the data in the system at that point in time. On all other days of the week, incremental backups are preformed. These backups contain copies of only those files that have changed. To restore data, the last full backup is restored and then any intervening incremental backups are applied. To avoid reliability problems and reduce restore times, most enterprises perform cumulative incremental backups.

6 Cumulative incremental backups collect and store copies of all the files that have changed since the last full backup was taken. Some solutions also offer an incremental forever . approach, where the data protection system can rebuild a virtual full from an initial full and the incremental backups. On average, enterprise systems have a daily file change rate of 3% per day; as a result, cumulative incremental backups range from 3% on day one to almost 18%. on day six, with a daily average over 10% (this white paper uses an average of 10% in the TCO calculations). Over the course of one week, a set of one full and six incremental backups results in times the amount of primary data storage per week. Enterprises also decide how many weeks of full and incremental backups to maintain in automated libraries for near-line restore.

7 Tapes rotated out of a library must be recovered from onsite or offsite storage, prolonging restore times. Enterprises, on average, leave between one and two months of data in the library, sometimes combined with a set of clones (copies) of the latest full backup in case the first set of tapes is corrupted. For medium and large enterprises, this white paper assumes six to seven weeks of near-line retention or about 10 times primary data storage. For small enterprises, who often maintain less data in near-line storage for cost reasons, this white paper assumes two weeks of data in near-line storage or times primary data storage. By maximizing its use of disk storage technology, avamar Axion provides customers with efficient full backups that are smaller than traditional tape incremental backups, eliminating the concept of incremental backups.

8 avamar has tested the Axion solution in over a hundred environments;. with remarkable consistency, Axion finds the initial level of redundancy across files and systems is between 40% and 70%. For example, with 100TB of primary storage, the initial backup can be stored in 30-60 TBs. This initial redundancy or commonality depends on how homogeneous the original systems are; for instance, a set of 10,000 Windows laptops can sometimes exceed 70%. initial redundancy. This white paper assumes an average initial redundancy of 55%. 44. avamar Technologies, Inc. April 2005 Version Commonality for daily backups is significantly higher. For Windows systems, commonality generally ranges between and ; for Solaris and Linux systems, commonality ranges between 99% and ; and for highly active Oracle database servers, the commonality may be as low as 95%.

9 This white paper assumes daily commonality of (each day's full backup is of the primary data being protected). Additional assumptions are as follows: 1. All hardware and software is calculated at list prices. Hardware configurations are detailed separately; tape backup software pricing is based on configurations from market-leading, enterprise backup software vendors. 2. Tape library configurations are full of drives and full of media at acquisition. 3. Hardware support is 15% of list price per year. 4. Software support is 20% of list price per year. 5. Tape media cost is based on a 100GB tape cartridge at $100. 6. Administrative staff efficiency is based on an Analysis performed by Giga Group in 2002, evaluating the benefits of disk-based vs. tape backup systems in a number of customer environments1.

10 7. The average, fully burdened cost of a storage administrator is $75,000 per year. 8. All hardware and software is depreciated/amortized over three years. 9. All costs are normalized $/GB per year, averaged over three years. 10. Pricing for wide area network (WAN) costs is included when backup data or replication data is transferred over a WAN (see figure 1). WAN costs used in this TCO Analysis represent an average of cost quotations we have solicited for bandwidth ranging from fractional-T1 to OC3. Note: although individual enterprises will find some variability in the cost components of the following scenarios, several real-world analyses have yielded consistent overall results. Figure 1. 1. September 2002: Giga Group: The Total Economic Impact of Deploying Network Appliance Nearstore Product for Backup and Recovery.


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