FreeBSD announced the release of FreeBSD 10.0-release. The main new features include the default package management tool pkg, enhanced virtualization, adding Bhyve, Virtio, and native quasi-virtualization drivers to support the use of FreeBSD as a guest operating system in Microsoft's Hyper-V; GCC is no longer installed on the schema clang as the default compiler The ZFS file system joins SSD trim support,
use instant recovery and do not need to start a backup, you can safely skip Xlog and save some space (default mode).Use traditional methods to create a basic backupNow Pg_basebackup is the most common way to get an initial copy of a database server. This is not always the case. Traditionally, a different approach has been used to work as follows:• Call SELECT Pg_start_backup (' some label ');• Copy all data files to a remote server via rsync or any other method• Run SELECT pg_stop_backup ();The
on each piece of hard disk, found that a hard disk on the same strip of data and other hard disk obviously different, so initially determine that the hard disk may be the first to drop the line, through the North Asia self-developed RAID verification program to check this strip, found that the hard disk analysis just analyzed the data is the best, So you can identify the hard drive that was first dropped.5. Analyzing LUN information in a RAID groupBecause the LUNs are based on RAID groups, the
In a notebook using the Intel i7SandyBridge architecture platform, this article will introduce the Performance Comparison Between PC-BSD/FreeBSD9.0rc and Ubuntu11.10. However, FreeBSD may be crazy to run on the latest intel platform, because the use of IntelHD2000/3000SandyBridge graphics card does not have mainstream support. The intel KMS/DRMLinux driver supports the FreeBSD kernel and
In a notebook using the Intel i7 Sandy Bridge architecture platform, this article will introduce the Performa
single operating system is that it inevitably leads to a proliferation of Windows. In other words, Windows gave birth to Windows. There's no way to break this cycle.On the other hand, *nix developers are usually familiar with multiple operating systems (linux,unix,osx,windows, etc.), the internal workings of an operating system, different distributions (based on Debian and Fedora based), window manager, Desktop Manager, file system, package management, Compile, recompile, repackage, command lin
Mirantis, one of the benchmark companies in the OpenStack field, released the latest MOS 8.0 version in early March 2016. This paper tries to make some inductive analysis based on the public data.1. Version Overview 1.1 overview
Community version: Liberty, the default integrated components include ceilometer,Cinder,Glance,Heat,Horizon, Ironic (first support),Keystone,Murano (an application catalog, first-time support),Neutron (using Open vSwitch 2.3.1, enhanced L3 HA VRRP, support for IPAM,
Better performance
Possible upt Dataset
During non-Batch inserts, the memory is allocated outside the heap. during batch inserts, the memory is allocated in the heap. Therefore, you must ensure sufficient heap size.
Spring transaction configuration: For details, see IMDB example transaction.
@Transactionalpublic void newActors( final ListPerformance and performance considerations
CPU: 32-bit, 64-bit
Memory: at least 1 GB, 4 ~ recommended ~ 8 GB
Disk: At least SCSI
single operating system is that it inevitably leads to a proliferation of Windows. In other words, Windows gave birth to Windows. There's no way to break this cycle.On the other hand, *nix developers are usually familiar with multiple operating systems (linux,unix,osx,windows, etc.), the internal workings of an operating system, different distributions (based on Debian and Fedora based), window manager, Desktop Manager, file system, package management, Compile, recompile, repackage, command lin
problem that developers can only operate on a single operating system is that it inevitably leads to a proliferation of Windows. In other words, Windows gave birth to Windows. There's no way to break this cycle.On the other hand, *nix developers are usually familiar with multiple operating systems (linux,unix,osx,windows, etc.), the internal workings of an operating system, different distributions (based on Debian and Fedora based), window manager, Desktop Manager, file system, package manageme
2018 Storage Technology Hotspots and trends summary
Over the past six months, I have read more than 30 papers and insisted on writing a Newsletter every 1-2 weeks, most of which are related to storage. Here is a summary today for you as a reference to understand the hotspots and trends in storage technology. This article contains new technical areas, such as Open-channel Ssd,machine Learning for Systems, as well as recent developments in the old topi
Solid state storage not only changes the storage industry, but also affects the entire computer field. We have seen that flash memory has completely changed the consumer electronics field, replacing rotating disk drives in almost every category of consumer electronics.This enthusiasm is also extending to the data center. Database Administrators, System administrators, and application system owners have begun to realize the benefits of solid state storage. They see the advantages of solid state s
For work requirements, read some flashcache content and record it as follows:
Implementation
Flashcache is a new open-source project developed by the Facebook Technical Team. It uses SSD hard disks to cache data to accelerate a MySQL kernel module. We can see that it was initially used for database acceleration, but it was also designed as a general cache module for any application built on Block devices.
Working principle. Based on device Mapper,
How to pick a solid state drive?
Open a large electric dealer website SSD Solid State hard disk Display page, currently can see 40 different brands. This may confuse many people, how can there be so many brands? To know, the mechanical hard disk market after the brutal competition baptism, currently left several famous brands: Seagate, Western Data (west), Toshiba, Hitachi, which Hitachi has also been acquired by the West. Mechanical hard disk manufa
the difference between SSD and common hard disk
In fact SSD solid-state drives are solid-state storage, belong to flash memory, long service life, not easy to damage, strong earthquake resistance. The disadvantage is: The price is expensive, the capacity is small.
Ordinary hard drive inside a platter, work through high-speed rotation to read and write information, very afraid of vibration, easy to damage,
m.2 and SATA3 solid state hard Drive area Don't
What do you mean, m.2?
M.2 is a new solid-state hard disk interface, is an alternative msata new interface specification, which we used to refer to NGFF, English is all called: Next Generation Form Factor.
M.2 Interface SSD The main advantage is that the volume is smaller than the traditional SATA3.0 and mSATA, and the reading speed is faster, which is better for some mobile device compati
How to build an Android development environment on a single machine
Old saying: to do good deeds, you must first sharpen your tools. To learn about Android development, I lost my blood and changed my computer. As the saying goes, it is a bit paranoid to sharpen the knife without mistake and make good use of the steel on the knife. In order to maximize the potential of the new book, I spent a long time doing configuration and optimization. However, the old saying goes completely correct from the
disk features and application scenarios
The disk is divided into local SSD disk and cloud disk, in which the cloud disk is divided into efficient cloud disk, SSD cloud disk and ordinary cloud disk. The following is an introduction to the characteristics and usage scenarios of these disks.
High Efficiency cloud Disk
SSD Cloud Disk
Common Cloud Plate
Local
accelerator, a single virtual network device, and a single virtual hard disk. The following command defines a ZFS file system and assigns a 10 Gb empty file as the Solaris System Disk:
# Zfs create rpool/ldoms
# Zfs set mountpoint =/ldoms rpool/ldoms
# Zfs set compression = on rpool/ldoms
#
650) this.width=650; "Src=" http://mmbiz.qpic.cn/mmbiz/ Uhiclcyeon0j1adsqkraiaficyleovjhrcq4pxibbaib8xp50mdzr0xcpjltlrhe8h3k2bwndvmkvp4nzqhzdg3r5w/640?wx_fmt=jpeg tp=webpwxfrom=5wx_lazy=1 "style=" Margin:0px;padding:0px;height:auto;width:auto; "alt=" 640?wx_fmt= Jpegtp=webpwxfrom=5wx_lazy "/> oracle Exadata The progress of the database all-in-one, while the stored sound is barely there. In a recent media communication meeting, > Oracle China Systems Division Sales Advisory Director, "We want t
The benefits of solid-state drives:
Benefits 1. Solid State Drives Fastspeed is the biggest advantage of solid-state drives, especially the random read and write speed is hundreds of times times the average hard drive.
Benefits 2. Solid-state HDD power consumption is lowerthe maximum power consumption of a common hard disk is about 5-10w, while solid-state drives are usually less than 3W and more environmentally friendly.
Benefits 3. Solid State Drive Completely noiselessMany people wil
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