Xen

Reading: [zen]
Field:
OS > Technology > Xen

Plural OS to be able to imagine and to be able to convert the computer, to be able to operate one of the hypothetical conversion software which simultaneous in parallel it tries. Ian Pratt of the English Cambridge university computer laboratory ([ian] Pratt) being something where the people begin development in 2002, presently it is open as the open source software. The XenSource corporation which the same people start does the development sale and the like of product edition.

As for Xen hypothetical machine monitor (VMM: Virtual Machine Monitor) with one of the software which is called. The hypothetical machine which manages the hardware resource of the computer with bundle, combines the part of that vis-a-vis OS (VM: Virtual Machine) You behave with as the hypothetical computer which is called. … The continuation is read

Xen is executed with the operational mode which usually is called “quasi- imagination conversion”, the actual computer prepares the hypothetical environment which differs, executes OS on that. It operates to high speed, but it is necessary to transplant OS to for hypothetical environment. Many of the UNIX affiliation OS such as Linux and FreeBSD are transplanted to the Xen hypothetical machine.

The microprocessor of the Intel corporation has, with the environment which can utilize the hypothetical conversion support function “of VT” and “AMD-V” of the AMD corporation etc, it is possible also with to operate Xen “complete hypothetical conversion” mode. As for this to operate entirely it is possible OS which operates with original hardware environment, but as for effective speed it is inferior than as for quasi- imagination conversion.

Xeon

Reading: Dione
Alias:
Xeon DP
Field:
Microprocessor > x86/Intel > Intel > Xeon

For work station server of Intel corporation brand name of high-end microprocessor.

With Pentium II Xeon/Pentium III Xeon “name of desktop edition +Xeon” the appearance which is said was taken, but from the Pentium 4 based product it became the name, “Xeon” simply.

Below is the explanation regarding “Pentium 4 based Xeon”. Because individual item is provided concerning Pentium II Xeon and Pentium III Xeon, reference we would like to ask there.

Pentium 4 based Xeon is 32 bit microprocessor of the Intel corporation. Pentium 4 similarly, with the NetBurst architecture based product which is the 7th generation x86 core of the Intel corporation, with Pentium 4 it corresponds to the multiprocessor operation which is not corresponding. Xeon furthermore only dual operation “Xeon” of correspondence and, corresponded into also the operation with the processor 4 or more is divided into “Xeon MP”. … The continuation is read

Both Xeon/Xeon MP, as for capacity of secondary cache in 0.18 millimicron edition in 256KB and 0.13 millimicron edition with 512KB common. In order with Xeon MP to be able to correspond to large-scale multiprocessor operation, 3 next cash of 512KB/1MB are loaded separately from the secondary cache.

As the big difference with Pentium 4, you can list the fact that it corresponds to Hyper-Threading where the plural threads share the computing element of the processor (as for Xeon of part as for non correspondence and Xeon MP all correspondence).

As for based clock also Xeon/Xeon MP the same as Pentium 4 400MHz (100MHz QDR). As for operational frequency the Hyper-Threading non corresponding edition (0.18 millimicron process) of Xeon 1.4GHz - 2GHz and Hyper-Threading corresponding edition (0.13 millimicron process) 1.8GHz - 2.4GHz. Xeon MP (entirely 0.18 millimicron process) has become 1.4GHz - 1.6GHz.

As for code name when developing 0.18 millimicron edition Xeon “Foster” and 0.13 millimicron edition Xeon “Prestonia” and 0.18 millimicron edition Xeon MP “Foster MP”.

XForms <X form>

Reading: [etsukusuhuomuzu]
Field:
Expression of information > markup language > XML > XForms

Standard of form specification in order to acquire the input function by the reader in the XML document. It was advised in 2003 October by W3C.

From the past, we designate the form specification of HTML which is utilized in input and the like of the Web sight as the base, we describe the part regarding indication with XHTML. However, the data which is formed like HTML is not the data of simple comma pause, it is transmitted to the server as the document which is expressed with XML.

As for the form of HTML data type the processing which specifies was necessary on receiving end with data type, but with XForms it appoints type to each field, it is designed in such a way that it can check the input which is not agreeable to type at stage of form.

XFree86

Reading: X free bee [ro] [ku]
Field:
OS > UNIX > UI > XFree86

Graphical user interface of the UNIX related OS standard (GUI) X Window System which is environment, being PC/AT interchangeable on board, it develops as the free software which operates distributes the project which. In addition, being gratuitous with the same project, the consecutive software which is open. Being, PC/AT interchangeable on board such as Linux, and FreeBSD it is possible to utilize with the UNIX interchangeability OS which operates.

XFS

Reading: X f s
Field:
OS > Technology > file system > XFS

One of the file systems which the SGI corporation developed, has journaling function.

Originally being something which was developed in order to use with IRIX which is the UNIX affiliation OS of the same company, presently the source code is released in the origin of GPL, anyone gratuitous and it is designed in such a way that it can be utilized. On the basis of the cord/code which the same company releases, transplantation to of other UNIX affiliation such as Linux OS is advanced.

There is a feature that it can retain the modification past record inside the file system making use of the journaling file system which applies database technology, when the file system breaks it can restore in high speed.

In addition, you adopt 64 bit file system, the disk space of maximum 1800TB (tera- byte), also the file of maximum 900TB can handle. … The continuation is read

These features because presently, it is something of the character which supplies the treatment and obstacle measure of the enormous file which even fault of the ext2 file system which is the file system which is widely used with Linux is said, attract attention.