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process. According to the hardware adjustment, and the previous work process together with, as large as possible, but do not run the CPU to 100% on the line. The maximum number of connections allowed per process, theoretically worker_processes*worker_connections per nginx serverKeepalive_timeout 60;KeepAlive time-out period.Client_header_buffer_size 4k;The buffer size of the client request header. This can be set according to your system paging size, generally a request header size will not exc

, high speed needs to accelerate the time a little longer, high-speed interval as small as possible. Here we set the acceleration frequency interval to 1KHZ, from 1K acceleration to 9K time required 0.3s . 1khz-0.03s;2khz-0.03s;3khz-0.03s;4khz-0.03s;5khz-0.04s;6khz-0.04s;7khz-0.05s;8khz-0.05s;9khz-0.2s.The combined time from 1K to 8 K is 0.3s, which is 0.3s after the frequency is 9KHZ.The number of pulses

If I have a file abc.gz, size 83456k, I would like to use the DD command to achieve the following backup results: First, the backup is divided into three parts, The first part is the backup file abc.gz the first 10000k, the second part is divided into the middle 70000k, the last backup behind the 3456k.The backup method is as follows three commands:DD if=abc.gz OF=ABC.GZ.BAK1 bs=1k count=10000DD if=abc.gz OF=ABC.GZ.BAK2 bs=

match the directory installed in PHP.6, modify the nginx.conf configuration file, open the support of PHPAfter the configuration is complete, double-click the Start_nginx.bat file directly. Can. Eight, configure Nginx expires cache function 1, the overall configuration validity period: For pictures, Css,js and other elements change less opportunities, especially the picture, you can set the picture in the browser local cache for 365 days, CSS,JS cache 10 days, this can improve the next time to

=1000*1000, M =1024*1024, XM =mGB =1000*1000*1000, G =1024*1024*1024, and so on for T, P, E, Z, YIi. Examples of Use1, the local/DEV/HDB full disk backup to/DEV/HDDDD If=/dev/hdb OF=/DEV/HDD2. Back up/DEV/HDB full data to the image file of the specified pathDD If=/dev/hdb Of=/root/image3, backup/DEV/HDB overall data, and use the Gzip tool to compress, save to the specified pathDD If=/dev/hdb | gzip >/root/image.gz4. Split a file into 3 files#文件大小为2.3k[[emailprotected]~]$lldb1_db_links.sql-rw-r-

The DF command lists the number of free disk space on the file system where the specified file name resides. If no file name is specified, all currently used file systems are displayed. By default, disk space is displayed as a block of 1K, and if the environment variable posixly_correct is set, a block of 512 bytes is displayed.Command formatDF [OPTION] ... [FILE] ...Command parameters-A,--allDisplays the usage of all file system disk space-B,--block-

8:37 core.22836-rw-r--r--1 billing_dx billing 410 Mar 17:38 dll_info.conf-rwxr-xr-x 1 billing_dx Billing 18:57 go [billing_dx@bmcs1 bin]$ ls-l--block-size=k total 577724k-rwxr-xr-x 1 billing_dx Billing 1078K Mar 18:56 acctmgrservice-rw-r--r--1 billing_dx billing 1K Mar 18:59 acctmgrservice.conf-rw-------1 BILLING_DX Billing 10691200K 18:37 core.22836-rw-r--r--1 billing_dx billing 1K Mar 17:38

range, and valid specified options. Efficient. The Micrium kernel also includes valuable runtime statistics that enable the internal visualization of your application. Identify performance bottlenecks and optimize power usage early in the development cycle. the features of the Μc/os kernel include the following highlights (highlights): preemptive multitasking real-time kernel, optional round-robin scheduling provides complete, clean, consistent source code with in-depth documentation. High scal

parameters, the first one is the inode is full, the second block is fullA feature of disk full (no space on device left)Summary of the Inode:1. A certain number of inode and block are generated when the disk is formatted as a EXT4 file system by partitioning2.inode is called an index node, which is used to store the file's attribute information and the index of the file (the entity that points to the file)The block of the 3.ext3/ext4 file system holds the actual contents of the file4.inode is a

block number, which is the direct address. As for the so-called indirect is to take a block to record the block number record area, if the file is too large, it will use the indirect block to record the number, that is, indirect addressing. Similarly, if the file continues to grow, it will use double indirection.So how many blocks can the inode specify? This is illustrated by a smaller block of 1KB. The following scenarios can be specified:1), 12 direct point: 12*

size is limited, only 128bytes capacity, record a block number occupies 4bytes, and for large files need a lot of block to store data, The number of blocks is far beyond the capacity that the Innode block can store. To this end, the file system uses a multi-level storage structure, there are 12 direct, 1 indirect, a double indirect, a three-indirect record area, so that the large file to meet the numerous block number records.Innode multistage structures such as:So, how many blocks can such a s