Instruction/ maintenance manual of the product IRP-TR-03-10 Intel
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Integrating Portable and Distributed Storage N. Tolia, J. Harkes, M. Kozuch, M. Satyanarayanan IRP-TR-03-10 INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTI ON WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPL IED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT.
Integrating P or table and Distrib uted Storage Niraj T olia †‡ , Jan Harkes † , Michael K ozuch ‡ , M. Saty anara y anan †‡ † Car negie Mellon Univ ersity , ‡ Intel Research Pittsburg.
2 Background T o understand the continuing popularity of portable storage, it is useful to revie w the strengths and weak- nesses of portable storage and distributed file systems. While there is considerable variation in the designs of distributed file systems, there is also a substantial de- gree of commonality across them.
there should be no compromise of robustness, consis- tency or security . There should also be no added com- plexity in sharing and collaboration. Finally , the design should be tolerant of human error.
cfs lka --clear exclude all inde xes cfs lka +db1 include index db1 cfs lka -db1 exclude inde x db1 cfs lka --list print lookaside statistics Figure 1 .
0% 20% 40% 60% 80% 100% 2 . 4 . 0 2 . 4 . 2 2 . 4 . 4 2 . 4 . 6 2 . 4 . 8 2 . 4. 10 2 . 4. 12 2 . 4. 14 2 . 4. 16 2 . 4. 18 2 . 4. 20 2 . 4. 22 2.4.0 2.4.1 2.4.2 2.4.3 2.4.4 2 .4.5 2.4.6 2.4.7 2.4.8 2.4.9 2.4.10 2.4.11 2.4.12 2.4.13 2 .4.14 2.4.15 2.4.
Lookaside De vice State Bandwidth No Device 2.4.18 2.4.17 2.4.13 2.4.9 2.4.0 100 Mb/s 287.7 (5.6) 292.7 (6.4) 324.7 (16.4) 346.4 (6.9) 362.7 (3.4) 358.1 (7.7) [-1.7%] [-12.9%] [-20.4%] [-26.1%] [-24.5%] 10 Mb/s 388.4 (12.9) 282.9 (8.3) 364.8 (12.4) 402.
suspend. 1 Lookaside caching can then reduce the per- formance ov erhead of cache misses at the resume site. A dif ferent use of lookaside caching for ISR is based on the observ ation that there is often substantial commonality in VM state across users.
No With Lookaside Lookaside Win 100 Mb/s 14 (0.5) 13 (2.2) 7.1% 10 Mb/s 39 (0.4) 12 (0.5) 69.2% 1 Mb/s 317 (0.3) 12 (0.3) 96.2% 100 Kb/s 4301 (0.6) 12 (0.1) 99.7% This table sho ws the resume latency (in seconds) for the CD A benchmark at different bandwidths, with and without looka- side to a USB flash memor y ke ychain.
Lookaside De vice State T race Bandwidth No De vice 100% 66% 33% 100 Mb/s 50.1 (2.6) 53.1 (2.4) 50.5 (3.1) 48.8 (1.9) Purcell 10 Mb/s 61.2 (2.0) 55.0 (6.5) 56.5 (2.9) 56.6 (4.6) 1 Mb/s 292.8 (4.1) 178.4 (3.1) 223.5 (1.8) 254.2 (2.0) 100 Kb/s 2828.7 (28.
No With Lookaside Lookaside Win 100 Mb/s 173 (9) 103 (3.9) 40.1% 10 Mb/s 370 (14) 163 (2.9) 55.9% 1 Mb/s 2688 (39) 899 (26.4) 66.6% 100 Kb/s 30531 (1490) 8567 (463.9) 71.9% This table giv es the total operation latency (in seconds) f or the CD A benchmark of Section 5.
possessed by portable devices, while simultaneously preserving the consistency , rob ustness and ease of shar- ing/collaboration provided by distrib uted file systems. One can en vision man y extensions to lookaside caching. For example, the client cache manager could track portable de vice state and update stale files auto- matically .
No Lookaside With Lookaside 0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000% Operations Sorted by Slowdown Slowdown 0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000% Operations Sorted by Slow.
An important point after buying a device Intel IRP-TR-03-10 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Intel IRP-TR-03-10 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Intel IRP-TR-03-10 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Intel IRP-TR-03-10 you will learn all the available features of the product, as well as information on its operation. The information that you get Intel IRP-TR-03-10 will certainly help you make a decision on the purchase.
If you already are a holder of Intel IRP-TR-03-10, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Intel IRP-TR-03-10.
However, one of the most important roles played by the user manual is to help in solving problems with Intel IRP-TR-03-10. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Intel IRP-TR-03-10 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
