{"id":1139,"date":"2019-01-11T14:06:00","date_gmt":"2019-01-11T13:06:00","guid":{"rendered":"https:\/\/samovar2022.int-evry.fr\/index.php\/2019\/01\/11\/seminaire-methodes-presente-par-mr-josu-doncel-le-14-01-19-a-11h-en-f209\/"},"modified":"2020-09-04T18:45:44","modified_gmt":"2020-09-04T16:45:44","slug":"seminaire-methodes-presente-par-mr-josu-doncel-le-14-01-19-a-11h-en-f209","status":"publish","type":"post","link":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/2019\/01\/11\/seminaire-methodes-presente-par-mr-josu-doncel-le-14-01-19-a-11h-en-f209\/","title":{"rendered":"S\u00e9minaire Methodes pr\u00e9sent\u00e9 par Mr Josu Doncel, le 14\/01\/19 \u00e0 11h en F209"},"content":{"rendered":"

Mr Josu Doncel, professeur invit\u00e9 \u00e0 Digicosme, donnera un s\u00e9minaire de l’\u00e9quipe M\u00e9thodes, le lundi 14 janvier \u00e0 11h, en salle F209<\/strong><\/p>\n

Titre: Size-Interval Routing to Parallel-Servers: economies of scale, performance balancing and asymptotical analysis<\/strong><\/p>\n

R\u00e9sum\u00e9:<\/strong> The question of how to route optimally jobs in parallel-server systems is of great importance since they model a wide range of systems such as data-centers or web-servers. In the size-interval routing each host serves jobs whose service demand is in a designated range. This routing policy is interesting from the practical point of view since it does not require signaling between the routers and servers. First, we consider the economies of scaling up the arrival rate and the number of servers proportionally and we study how the degradation increases with the variability of the incoming job size distribution. Then, we present a size-interval routing that, instead of optimizing the performance of the system, balances the performance of the queues and we study the properties of this new routing policy. Finally, we analyze the performance of this system under an asymptotical regime where the system capacity grows linearly with the system demand to infinity and we present optimality results of this regime.<\/p>\n

Biographie:<\/strong>
\nJosu Doncel Vicente est maitre de conf\u00e9rences \u00e0 l’Universit\u00e9 du pays Basque dans le domaine de l’\u00e9valuation des performances et de l’optimisation dans les r\u00e9seaux.
\nIl a effectu\u00e9 sa th\u00e8se de doctorat au laboratoire LAAS de Toulouse, o\u00f9 il a utilis\u00e9 la th\u00e9orie des jeux et la th\u00e9orie des files d’attente afin de r\u00e9soudre des probl\u00e8mes de
\nperformance et d’optimisation dans les r\u00e9seaux (\u00e9quilibrage de charge, recherche de chemin optimal). Il a ensuite effectu\u00e9 un post-doc \u00e0 l’Inria
\nGrenoble o\u00f9 il a utilis\u00e9 la th\u00e9orie des jeux en champ moyen pour \u00e9tudier les dynamiques de propagation de virus (ou de diffusion d’information) dans des syst\u00e8mes qui contiennent un grand nombre d’\u00e9l\u00e9ments.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mr Josu Doncel, professeur invit\u00e9 \u00e0 Digicosme, donnera un s\u00e9minaire de l’\u00e9quipe M\u00e9thodes, le lundi 14 janvier \u00e0 11h, en salle F209 Titre: Size-Interval Routing to Parallel-Servers: economies of scale, performance balancing and asymptotical analysis R\u00e9sum\u00e9: The question of how to route optimally jobs in parallel-server systems is of great importance since they model a […]<\/p>\n","protected":false},"author":1,"featured_media":1138,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[294],"tags":[],"class_list":["post-1139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seminaires-2019-methodes-fr","entry","has-media"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/1139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=1139"}],"version-history":[{"count":1,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/1139\/revisions"}],"predecessor-version":[{"id":1489,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/1139\/revisions\/1489"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media\/1138"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=1139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=1139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=1139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}