What is the overall storage cost for a file of size 950 MBs, when the HDFS replication factor is set to 3?
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What is the overall storage cost for a file of size 950 MBs, when the HDFS replication factor is set to 3?
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- Suppose a file system uses the Block bitmap to indicate allocation status of blocks in the File Contents region, and the FCB bitmap to indicate usage status of FCBs. The Block bitmap uses N blocks, whereas the FCB bitmap uses 1 block. (a) If the File Contents region is 32Gbytes and the block size is 4Kbytes, how many blocks (N) should be allocated to the Block bitmap? (b) Also, if each FCB is 128 bytes, how many blocks should be allocated to the FCB table (A table which stores FCBs)? (2) [ ts] Inode Structure In an i-node based file system implementation, the i-node typically stores 12 direct block pointers, one 1-indirect block pointer, one 2-indirect block pointer, and one 3-indirect block pointer. Recall that an indirect block is a disk block storing an array of disk block addresses (i.e. pointers). The pointers in a 1-indirect block point to disk blocks that store file data. The pointers in a 2-indirect (or 3-indirect) block point to other 1-indirect (or 2-indirect) blocks. Suppose…Suppose a Unix Inode has 10 direct disk block pointers, one single indirect block pointer, one double indirect block pointer, and one triple indirect block pointer. For convenience, each index table has 256 = 28 entries and each block has 1K = 210 bytes. What is the maximum size of a Unix file in Kbytes?On a 16 GB hard disk drive (HDD), each cluster consists of 32 sectors and each sector has a fixed size of 512 bytes. A text file with a size of 150,000 bytes is to be stored. a. i.How many clusters does the text file take up in memory? ii.What is the size of the slack space, in bytes, once the file has been stored?
- What is a Buffering, and why is it so?A file system with 300 GByte uses a file descriptor with 8 direct block address. 1 indirect block address and 1 doubly indirect block address. The size of each disk block is 128 Bytes and the size of each disk block address is 8 Bytes. Find the maximum possible file size in this file system.What is the maximum file size supported by a file system with 16 direct blocks,single,double,and triple indirection?the block size is 1k bytes.Disk block numbers can be stored in 4 bytes? give the answer in detail
- A file system uses X-KB disk blocks. There are a total of 2^10 files on this system. We use bitmap based free block representations. The disk size is Y-KB. What would be the wasted disk space for fragmentation and free block representation. Explain your answerSuppose you have a 100GB database housed on a disk array that supports a transfer rate of 60MBps and a tape drive that supports 200GB cartridges with a transfer rate of 80MBps. How long will it take to back up the database? What is the transfer time if 2:1 compression is possible?A FAT (file allocation table) based file system is being used and the total overhead of each entry in the FAT is 4 bytes in size. Given a 100 × 106 bytes disk on which the file system is stored and data block size is 10³ bytes, the maximum size of a file that can be stored on this disk in units of 106bytes is
- The performance of a file system depends upon the cache hit rate (fraction of blocks found in the cache). If it takes 1 msec to satisfy a request from the cache, but 40 msec to satisfy a request if a disk read is needed, give a formula for the mean time required to satisfy a request if the hit rate is h. Plot this function for values of h varying from 0 to 1.0. Explain your logic and justify the structure of the formula.If AES-192-CBC is used for encrypting a file of size 1800 byte, then find the total number of blocks that are generated by the whole process?In architectures with two tiers, the server that provides clients with disc-paged data is referred to as an.