Á¤º¸°úÇÐȸ ³í¹®Áö A : ½Ã½ºÅÛ ¹× ÀÌ·Ð
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
VOD ½Ã½ºÅÛ¿¡¼ CPU °¡¿ë¼ºÀ» ÃÖ´ëÈÇÏ´Â ÀúÀå°ø°£°ü¸® ¾Ë°í¸®Áò |
¿µ¹®Á¦¸ñ(English Title) |
An Algorithm for Managing Storage Space to Maximize the CPU Availability in VOD Systems |
ÀúÀÚ(Author) |
Á¤ÁöÂù
°íÀçµÎ
¼Û¹Î¼®
½ÉÁ¤¼·
Jichan Jung
Jaedoo Go
Minseok Song
Jeong Seop Sim
|
¿ø¹®¼ö·Ïó(Citation) |
VOL 36 NO. 03 PP. 0140 ~ 0148 (2009. 06) |
Çѱ۳»¿ë (Korean Abstract) |
VOD ¼¹ö¿¡ ¼ºñ½º¸¦ ¿äûÇÏ´Â ´Ü¸»ÀåÄ¡ÀÇ Á¾·ù°¡ ´Ù¾çÇØÁüÀ¸·Î ÀÎÇØ VOD ¼ºñ½º »ç¾÷ÀÚ°¡ Á¦°øÇØ¾ß ÇÏ´Â ÇØ»óµµ ¹öÀüÀÇ Á¾·ù ¿ª½Ã ´Ù¾çÇØÁö°í ÀÖ´Ù. ´Ü¸»ÀåÄ¡°¡ ¼ºñ½º¸¦ ¿äûÇÒ ¶§ ¼¹ö´Â ´Ü¸»ÀåÄ¡¿¡ ¸Â´Â ÇØ»óµµ ¹öÀüÀ¸·Î ¼ºñ½º¸¦ Á¦°øÇØ¾ß Çϴµ¥ ´ë°³ÀÇ °æ¿ì ¼¹öÀÇ ÀúÀå°ø°£ÀÇ ¿ë·®ÀÌ Á¦ÇѵǾî Àֱ⠶§¹®¿¡ ºñµð¿Àº°·Î ¸ðµç ÇØ»óµµ ¹öÀüµéÀ» ÀúÀåÇÏ°í ÀÖ±â´Â ¾î·Æ´Ù. ´Ü¸»ÀåÄ¡°¡ ¼¹ö¿¡ ÀúÀåµÇ¾î ÀÖ´Â ÇØ»óµµ ¹öÀüÀ» ¿äûÇÑ °æ¿ì¶ó¸é ¹Ù·Î ¼ºñ½º°¡ °¡´ÉÇÏ´Ù. ÇÏÁö¸¸ ´Ü¸»ÀåÄ¡°¡ ¼¹ö¿¡ ÀúÀåµÇ¾î ÀÖÁö ¾ÊÀº ÇØ»óµµ ¹öÀüÀ» ¿äûÇß´Ù¸é ÀúÀåµÇ¾î ÀÖ´ø ¹öÀüÀ» ÀÌ¿ëÇØ Çػ󵵸¦ º¯È¯ÇÑ ÈÄ ¼ºñ½º¸¦ ÇØÁÖ¾î¾ß ÇÑ´Ù. ¸¸¾à ¼¹ö°¡ Çػ󵵸¦ º¯È¯ÇÏ´Â ºóµµ°¡ ³ô¾Æ CPU °¡¿ë¼ºÀÌ ÃæºÐÇÏÁö ¾Ê´Ù¸é ´Ù¸¥ ´Ü¸»ÀåÄ¡µéÀÇ ¼ºñ½º ¿äû¿¡ ¹Ù·Î ÀÀÇÒ ¼ö ¾ø°Ô µÈ´Ù. µû¶ó¼ ¼¹ö¿¡ ÀúÀåµÇ´Â ÆÄÀϵéÀ» CPU »ç¿ë·üÀ» ÁÙÀÏ ¼ö ÀÖ´Â ÇØ»óµµÀÇ ¹öÀüµé·Î ÀúÀåÇÏ¿© CPU °¡¿ë¼ºÀ» ³ôÀÎ´Ù¸é º¸´Ù ¸¹Àº ´Ü¸»ÀåÄ¡ÀÇ ¿äûÀ» Çã¿ëÇÒ ¼ö ÀÖÀ» °ÍÀÌ´Ù.
º» ³í¹®¿¡¼´Â ÇÑÁ¤µÈ ÀúÀå¿ë·®À» °¡Áø VOD ¼¹ö°¡ ´Ü¸»ÀåÄ¡ÀÇ ¼ºñ½º ¿äûµéÀ» °¡´ÉÇÑ ¸¹ÀÌ Çã¿ëÇϱâ À§ÇØ ÀúÀåÇØ¾ß ÇÒ °¢ ºñµð¿ÀÀÇ ÇØ»óµµ ¹öÀüµéÀ» ºÐ±âÇÑÁ¤ ±â¹ýÀ» ÀÌ¿ëÇÏ¿© ã´Â ¾Ë°í¸®ÁòÀ» Á¦½ÃÇÑ´Ù. |
¿µ¹®³»¿ë (English Abstract) |
Recent advances in communication and multimedia technologies make it possible to provide video-on-demand(VOD) services and people can access video servers over the Internet at any time using their electronic devices, such as PDA, mobile phone and digital TV. Each device has different processing capabilities, energy budgets, display sizes and network connectivities. To support such diverse devices, multiple versions of videos are needed to meet users¡¯ requests. In general cases, VOD servers cannot store all the versions of videos due to the storage limitation. When a device requests a stored version, the server can send the appropriate version immediately, but when the requested version is not stored, the server first converts some stored version to the requested version, and then sends it to the client. We call this conversion process transcoding. If transcoding occurs frequently in a VOD server, the CPU resource of the server becomes insufficient to response to clients. Thus, to admit as many requests as possible, we need to maximize the CPU In this paper, we propose a new algorithm to select versions from those stored on disk using a branch and bound technique to maximize the CPU availability. We also explore the impact of these storage management policies on streaming to heterogeneous users. |
Å°¿öµå(Keyword) |
Æ®·£½ºÄÚµù
VOD
ºÐ±âÇÑÁ¤ ±â¹ý
CPU °¡¿ë¼º
ÀúÀå°ø°£
transcoding
VOD
branch and bound
CPU availability
storage space
|
ÆÄÀÏ÷ºÎ |
PDF ´Ù¿î·Îµå
|