| conclusions.ms (1639) | conclusions.ms (18715) |
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| 1.\" Copyright (c) 1983 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)conclusions.ms 6.2 (Berkeley) 4/16/91 | 1.\" Copyright (c) 1983 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)conclusions.ms 6.2 (Berkeley) 4/16/91 |
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| 33.\" 34.ds RH Conclusions 35.NH 36Conclusions 37.PP 38Peak available throughput is only one criterion 39in most storage system purchasing decisions. 40Most of the VAX UNIX systems we are familiar with --- 12 unchanged lines hidden (view full) --- 53Cost, reliability, availability, and support are some of these 54factors. 55The maturity of the technology purchased must also be weighed 56against the future value and expandability of newer technologies. 57.PP 58Two important conclusions about storage systems in general 59can be drawn from these tests. 60The first is that buffering can be effective in smoothing | 34.\" 35.ds RH Conclusions 36.NH 37Conclusions 38.PP 39Peak available throughput is only one criterion 40in most storage system purchasing decisions. 41Most of the VAX UNIX systems we are familiar with --- 12 unchanged lines hidden (view full) --- 54Cost, reliability, availability, and support are some of these 55factors. 56The maturity of the technology purchased must also be weighed 57against the future value and expandability of newer technologies. 58.PP 59Two important conclusions about storage systems in general 60can be drawn from these tests. 61The first is that buffering can be effective in smoothing |
| 61the the effects of lower bus speeds and bus contention. | 62the effects of lower bus speeds and bus contention. |
| 62Even though the UDA50 is located on the relatively slow 63UNIBUS, its performance is similar to controllers located on 64the faster processor busses. 65However, the SC780 with only one sector of buffering shows that 66little buffering is needed if the underlying bus is fast enough. 67.PP 68Placing more intelligence in the controller seems to hinder UNIX system 69performance more than it helps. --- 58 unchanged lines hidden --- | 63Even though the UDA50 is located on the relatively slow 64UNIBUS, its performance is similar to controllers located on 65the faster processor busses. 66However, the SC780 with only one sector of buffering shows that 67little buffering is needed if the underlying bus is fast enough. 68.PP 69Placing more intelligence in the controller seems to hinder UNIX system 70performance more than it helps. --- 58 unchanged lines hidden --- |